18131980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{113}}^2$

素因数の和:306

約数の個数: 36

約数和(自身を含む): 38958192

約数和(自身を除く): 20826212

約数列:

[1, 2, 4, 5, 10, 20, 71, 113, 142, 226, 284, 355, 452, 565, 710, 1130, 1420, 2260, 8023, 12769, 16046, 25538, 32092, 40115, 51076, 63845, 80230, 127690, 160460, 255380, 906599, 1813198, 3626396, 4532995, 9065990, 18131980]

約数ペア:

[(1, 18131980), (2, 9065990), (4, 4532995), (5, 3626396), (10, 1813198), (20, 906599), (71, 255380), (113, 160460), (142, 127690), (226, 80230), (284, 63845), (355, 51076), (452, 40115), (565, 32092), (710, 25538), (1130, 16046), (1420, 12769), (2260, 8023)]