19987920

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1$

素因数の和:130

約数の個数: 240

約数和(自身を含む): 75209472

約数和(自身を除く): 55221552

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 17, 18, 20, 23, 24, 30, 34, 36, 40, 45, 46, 48, 51, 60, 68, 69, 71, 72, 80, 85, 90, 92, 102, 115, 120, 136, 138, 142, 144, 153, 170, 180, 184, 204, 207, 213, 230, 240, 255, 272, 276, 284, 306, 340, 345, 355, 360, 368, 391, 408, 414, 426, 460, 510, 552, 568, 612, 639, 680, 690, 710, 720, 765, 782, 816, 828, 852, 920, 1020, 1035, 1065, 1104, 1136, 1173, 1207, 1224, 1278, 1360, 1380, 1420, 1530, 1564, 1633, 1656, 1704, 1840, 1955, 2040, 2070, 2130, 2346, 2414, 2448, 2556, 2760, 2840, 3060, 3128, 3195, 3266, 3312, 3408, 3519, 3621, 3910, 4080, 4140, 4260, 4692, 4828, 4899, 5112, 5520, 5680, 5865, 6035, 6120, 6256, 6390, 6532, 7038, 7242, 7820, 8165, 8280, 8520, 9384, 9656, 9798, 10224, 10863, 11730, 12070, 12240, 12780, 13064, 14076, 14484, 14697, 15640, 16330, 16560, 17040, 17595, 18105, 18768, 19312, 19596, 21726, 23460, 24140, 24495, 25560, 26128, 27761, 28152, 28968, 29394, 31280, 32660, 35190, 36210, 39192, 43452, 46920, 48280, 48990, 51120, 54315, 55522, 56304, 57936, 58788, 65320, 70380, 72420, 73485, 78384, 83283, 86904, 93840, 96560, 97980, 108630, 111044, 117576, 130640, 138805, 140760, 144840, 146970, 166566, 173808, 195960, 217260, 222088, 235152, 249849, 277610, 281520, 289680, 293940, 333132, 391920, 416415, 434520, 444176, 499698, 555220, 587880, 666264, 832830, 869040, 999396, 1110440, 1175760, 1249245, 1332528, 1665660, 1998792, 2220880, 2498490, 3331320, 3997584, 4996980, 6662640, 9993960, 19987920]

約数ペア:

[(1, 19987920), (2, 9993960), (3, 6662640), (4, 4996980), (5, 3997584), (6, 3331320), (8, 2498490), (9, 2220880), (10, 1998792), (12, 1665660), (15, 1332528), (16, 1249245), (17, 1175760), (18, 1110440), (20, 999396), (23, 869040), (24, 832830), (30, 666264), (34, 587880), (36, 555220), (40, 499698), (45, 444176), (46, 434520), (48, 416415), (51, 391920), (60, 333132), (68, 293940), (69, 289680), (71, 281520), (72, 277610), (80, 249849), (85, 235152), (90, 222088), (92, 217260), (102, 195960), (115, 173808), (120, 166566), (136, 146970), (138, 144840), (142, 140760), (144, 138805), (153, 130640), (170, 117576), (180, 111044), (184, 108630), (204, 97980), (207, 96560), (213, 93840), (230, 86904), (240, 83283), (255, 78384), (272, 73485), (276, 72420), (284, 70380), (306, 65320), (340, 58788), (345, 57936), (355, 56304), (360, 55522), (368, 54315), (391, 51120), (408, 48990), (414, 48280), (426, 46920), (460, 43452), (510, 39192), (552, 36210), (568, 35190), (612, 32660), (639, 31280), (680, 29394), (690, 28968), (710, 28152), (720, 27761), (765, 26128), (782, 25560), (816, 24495), (828, 24140), (852, 23460), (920, 21726), (1020, 19596), (1035, 19312), (1065, 18768), (1104, 18105), (1136, 17595), (1173, 17040), (1207, 16560), (1224, 16330), (1278, 15640), (1360, 14697), (1380, 14484), (1420, 14076), (1530, 13064), (1564, 12780), (1633, 12240), (1656, 12070), (1704, 11730), (1840, 10863), (1955, 10224), (2040, 9798), (2070, 9656), (2130, 9384), (2346, 8520), (2414, 8280), (2448, 8165), (2556, 7820), (2760, 7242), (2840, 7038), (3060, 6532), (3128, 6390), (3195, 6256), (3266, 6120), (3312, 6035), (3408, 5865), (3519, 5680), (3621, 5520), (3910, 5112), (4080, 4899), (4140, 4828), (4260, 4692)]