639567940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{78571}}^1$

素因数の和:78628

約数の個数: 48

約数和(自身を含む): 1504810944

約数和(自身を除く): 865243004

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 37, 44, 55, 74, 110, 148, 185, 220, 370, 407, 740, 814, 1628, 2035, 4070, 8140, 78571, 157142, 314284, 392855, 785710, 864281, 1571420, 1728562, 2907127, 3457124, 4321405, 5814254, 8642810, 11628508, 14535635, 17285620, 29071270, 31978397, 58142540, 63956794, 127913588, 159891985, 319783970, 639567940]

約数ペア:

[(1, 639567940), (2, 319783970), (4, 159891985), (5, 127913588), (10, 63956794), (11, 58142540), (20, 31978397), (22, 29071270), (37, 17285620), (44, 14535635), (55, 11628508), (74, 8642810), (110, 5814254), (148, 4321405), (185, 3457124), (220, 2907127), (370, 1728562), (407, 1571420), (740, 864281), (814, 785710), (1628, 392855), (2035, 314284), (4070, 157142), (8140, 78571)]