20091640

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12251}}^1$

素因数の和:12303

約数の個数: 32

約数和(自身を含む): 46312560

約数和(自身を除く): 26220920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12251, 24502, 49004, 61255, 98008, 122510, 245020, 490040, 502291, 1004582, 2009164, 2511455, 4018328, 5022910, 10045820, 20091640]

約数ペア:

[(1, 20091640), (2, 10045820), (4, 5022910), (5, 4018328), (8, 2511455), (10, 2009164), (20, 1004582), (40, 502291), (41, 490040), (82, 245020), (164, 122510), (205, 98008), (328, 61255), (410, 49004), (820, 24502), (1640, 12251)]