81785080

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157279}}^1$

素因数の和:157303

約数の個数: 32

約数和(自身を含む): 198172800

約数和(自身を除く): 116387720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 157279, 314558, 629116, 786395, 1258232, 1572790, 2044627, 3145580, 4089254, 6291160, 8178508, 10223135, 16357016, 20446270, 40892540, 81785080]

約数ペア:

[(1, 81785080), (2, 40892540), (4, 20446270), (5, 16357016), (8, 10223135), (10, 8178508), (13, 6291160), (20, 4089254), (26, 3145580), (40, 2044627), (52, 1572790), (65, 1258232), (104, 786395), (130, 629116), (260, 314558), (520, 157279)]