128663020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{207521}}^1$

素因数の和:207561

約数の個数: 24

約数和(自身を含む): 278909568

約数和(自身を除く): 150246548

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 207521, 415042, 830084, 1037605, 2075210, 4150420, 6433151, 12866302, 25732604, 32165755, 64331510, 128663020]

約数ペア:

[(1, 128663020), (2, 64331510), (4, 32165755), (5, 25732604), (10, 12866302), (20, 6433151), (31, 4150420), (62, 2075210), (124, 1037605), (155, 830084), (310, 415042), (620, 207521)]