21207840

素因数分解:

$2^5\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{113}}^1$

素因数の和:171

約数の個数: 192

約数和(自身を含む): 74462976

約数和(自身を除く): 53255136

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 23, 24, 30, 32, 34, 40, 46, 48, 51, 60, 68, 69, 80, 85, 92, 96, 102, 113, 115, 120, 136, 138, 160, 170, 184, 204, 226, 230, 240, 255, 272, 276, 339, 340, 345, 368, 391, 408, 452, 460, 480, 510, 544, 552, 565, 678, 680, 690, 736, 782, 816, 904, 920, 1020, 1104, 1130, 1173, 1356, 1360, 1380, 1564, 1632, 1695, 1808, 1840, 1921, 1955, 2040, 2208, 2260, 2346, 2599, 2712, 2720, 2760, 3128, 3390, 3616, 3680, 3842, 3910, 4080, 4520, 4692, 5198, 5424, 5520, 5763, 5865, 6256, 6780, 7684, 7797, 7820, 8160, 9040, 9384, 9605, 10396, 10848, 11040, 11526, 11730, 12512, 12995, 13560, 15368, 15594, 15640, 18080, 18768, 19210, 20792, 23052, 23460, 25990, 27120, 28815, 30736, 31188, 31280, 37536, 38420, 38985, 41584, 44183, 46104, 46920, 51980, 54240, 57630, 61472, 62376, 62560, 76840, 77970, 83168, 88366, 92208, 93840, 103960, 115260, 124752, 132549, 153680, 155940, 176732, 184416, 187680, 207920, 220915, 230520, 249504, 265098, 307360, 311880, 353464, 415840, 441830, 461040, 530196, 623760, 662745, 706928, 883660, 922080, 1060392, 1247520, 1325490, 1413856, 1767320, 2120784, 2650980, 3534640, 4241568, 5301960, 7069280, 10603920, 21207840]

約数ペア:

[(1, 21207840), (2, 10603920), (3, 7069280), (4, 5301960), (5, 4241568), (6, 3534640), (8, 2650980), (10, 2120784), (12, 1767320), (15, 1413856), (16, 1325490), (17, 1247520), (20, 1060392), (23, 922080), (24, 883660), (30, 706928), (32, 662745), (34, 623760), (40, 530196), (46, 461040), (48, 441830), (51, 415840), (60, 353464), (68, 311880), (69, 307360), (80, 265098), (85, 249504), (92, 230520), (96, 220915), (102, 207920), (113, 187680), (115, 184416), (120, 176732), (136, 155940), (138, 153680), (160, 132549), (170, 124752), (184, 115260), (204, 103960), (226, 93840), (230, 92208), (240, 88366), (255, 83168), (272, 77970), (276, 76840), (339, 62560), (340, 62376), (345, 61472), (368, 57630), (391, 54240), (408, 51980), (452, 46920), (460, 46104), (480, 44183), (510, 41584), (544, 38985), (552, 38420), (565, 37536), (678, 31280), (680, 31188), (690, 30736), (736, 28815), (782, 27120), (816, 25990), (904, 23460), (920, 23052), (1020, 20792), (1104, 19210), (1130, 18768), (1173, 18080), (1356, 15640), (1360, 15594), (1380, 15368), (1564, 13560), (1632, 12995), (1695, 12512), (1808, 11730), (1840, 11526), (1921, 11040), (1955, 10848), (2040, 10396), (2208, 9605), (2260, 9384), (2346, 9040), (2599, 8160), (2712, 7820), (2720, 7797), (2760, 7684), (3128, 6780), (3390, 6256), (3616, 5865), (3680, 5763), (3842, 5520), (3910, 5424), (4080, 5198), (4520, 4692)]