20710640

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{113}}^1$

素因数の和:234

約数の個数: 80

約数和(自身を含む): 50889600

約数和(自身を除く): 30178960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 79, 80, 113, 116, 145, 158, 226, 232, 290, 316, 395, 452, 464, 565, 580, 632, 790, 904, 1130, 1160, 1264, 1580, 1808, 2260, 2291, 2320, 3160, 3277, 4520, 4582, 6320, 6554, 8927, 9040, 9164, 11455, 13108, 16385, 17854, 18328, 22910, 26216, 32770, 35708, 36656, 44635, 45820, 52432, 65540, 71416, 89270, 91640, 131080, 142832, 178540, 183280, 258883, 262160, 357080, 517766, 714160, 1035532, 1294415, 2071064, 2588830, 4142128, 5177660, 10355320, 20710640]

約数ペア:

[(1, 20710640), (2, 10355320), (4, 5177660), (5, 4142128), (8, 2588830), (10, 2071064), (16, 1294415), (20, 1035532), (29, 714160), (40, 517766), (58, 357080), (79, 262160), (80, 258883), (113, 183280), (116, 178540), (145, 142832), (158, 131080), (226, 91640), (232, 89270), (290, 71416), (316, 65540), (395, 52432), (452, 45820), (464, 44635), (565, 36656), (580, 35708), (632, 32770), (790, 26216), (904, 22910), (1130, 18328), (1160, 17854), (1264, 16385), (1580, 13108), (1808, 11455), (2260, 9164), (2291, 9040), (2320, 8927), (3160, 6554), (3277, 6320), (4520, 4582)]