20781617720

素因数分解:

$2^3\times 5^1\times {\mathrm{659}}^1\times {\mathrm{788377}}^1$

素因数の和:789047

約数の個数: 32

約数和(自身を含む): 46829653200

約数和(自身を除く): 26048035480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 659, 1318, 2636, 3295, 5272, 6590, 13180, 26360, 788377, 1576754, 3153508, 3941885, 6307016, 7883770, 15767540, 31535080, 519540443, 1039080886, 2078161772, 2597702215, 4156323544, 5195404430, 10390808860, 20781617720]

約数ペア:

[(1, 20781617720), (2, 10390808860), (4, 5195404430), (5, 4156323544), (8, 2597702215), (10, 2078161772), (20, 1039080886), (40, 519540443), (659, 31535080), (1318, 15767540), (2636, 7883770), (3295, 6307016), (5272, 3941885), (6590, 3153508), (13180, 1576754), (26360, 788377)]