28004920

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{1663}}^1$

素因数の和:2095

約数の個数: 32

約数和(自身を含む): 63198720

約数和(自身を除く): 35193800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1663, 1684, 2105, 3326, 3368, 4210, 6652, 8315, 8420, 13304, 16630, 16840, 33260, 66520, 700123, 1400246, 2800492, 3500615, 5600984, 7001230, 14002460, 28004920]

約数ペア:

[(1, 28004920), (2, 14002460), (4, 7001230), (5, 5600984), (8, 3500615), (10, 2800492), (20, 1400246), (40, 700123), (421, 66520), (842, 33260), (1663, 16840), (1684, 16630), (2105, 13304), (3326, 8420), (3368, 8315), (4210, 6652)]