20909880

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{1019}}^1$

素因数の和:1058

約数の個数: 128

約数和(自身を含む): 73440000

約数和(自身を除く): 52530120

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 19, 20, 24, 27, 30, 36, 38, 40, 45, 54, 57, 60, 72, 76, 90, 95, 108, 114, 120, 135, 152, 171, 180, 190, 216, 228, 270, 285, 342, 360, 380, 456, 513, 540, 570, 684, 760, 855, 1019, 1026, 1080, 1140, 1368, 1710, 2038, 2052, 2280, 2565, 3057, 3420, 4076, 4104, 5095, 5130, 6114, 6840, 8152, 9171, 10190, 10260, 12228, 15285, 18342, 19361, 20380, 20520, 24456, 27513, 30570, 36684, 38722, 40760, 45855, 55026, 58083, 61140, 73368, 77444, 91710, 96805, 110052, 116166, 122280, 137565, 154888, 174249, 183420, 193610, 220104, 232332, 275130, 290415, 348498, 366840, 387220, 464664, 522747, 550260, 580830, 696996, 774440, 871245, 1045494, 1100520, 1161660, 1393992, 1742490, 2090988, 2323320, 2613735, 3484980, 4181976, 5227470, 6969960, 10454940, 20909880]

約数ペア:

[(1, 20909880), (2, 10454940), (3, 6969960), (4, 5227470), (5, 4181976), (6, 3484980), (8, 2613735), (9, 2323320), (10, 2090988), (12, 1742490), (15, 1393992), (18, 1161660), (19, 1100520), (20, 1045494), (24, 871245), (27, 774440), (30, 696996), (36, 580830), (38, 550260), (40, 522747), (45, 464664), (54, 387220), (57, 366840), (60, 348498), (72, 290415), (76, 275130), (90, 232332), (95, 220104), (108, 193610), (114, 183420), (120, 174249), (135, 154888), (152, 137565), (171, 122280), (180, 116166), (190, 110052), (216, 96805), (228, 91710), (270, 77444), (285, 73368), (342, 61140), (360, 58083), (380, 55026), (456, 45855), (513, 40760), (540, 38722), (570, 36684), (684, 30570), (760, 27513), (855, 24456), (1019, 20520), (1026, 20380), (1080, 19361), (1140, 18342), (1368, 15285), (1710, 12228), (2038, 10260), (2052, 10190), (2280, 9171), (2565, 8152), (3057, 6840), (3420, 6114), (4076, 5130), (4104, 5095)]