21551360

素因数分解:

$2^8\times 5^1\times {\mathrm{113}}^1\times {\mathrm{149}}^1$

素因数の和:283

約数の個数: 72

約数和(自身を含む): 52428600

約数和(自身を除く): 30877240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 113, 128, 149, 160, 226, 256, 298, 320, 452, 565, 596, 640, 745, 904, 1130, 1192, 1280, 1490, 1808, 2260, 2384, 2980, 3616, 4520, 4768, 5960, 7232, 9040, 9536, 11920, 14464, 16837, 18080, 19072, 23840, 28928, 33674, 36160, 38144, 47680, 67348, 72320, 84185, 95360, 134696, 144640, 168370, 190720, 269392, 336740, 538784, 673480, 1077568, 1346960, 2155136, 2693920, 4310272, 5387840, 10775680, 21551360]

約数ペア:

[(1, 21551360), (2, 10775680), (4, 5387840), (5, 4310272), (8, 2693920), (10, 2155136), (16, 1346960), (20, 1077568), (32, 673480), (40, 538784), (64, 336740), (80, 269392), (113, 190720), (128, 168370), (149, 144640), (160, 134696), (226, 95360), (256, 84185), (298, 72320), (320, 67348), (452, 47680), (565, 38144), (596, 36160), (640, 33674), (745, 28928), (904, 23840), (1130, 19072), (1192, 18080), (1280, 16837), (1490, 14464), (1808, 11920), (2260, 9536), (2384, 9040), (2980, 7232), (3616, 5960), (4520, 4768)]