20982520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40351}}^1$

素因数の和:40375

約数の個数: 32

約数和(自身を含む): 50843520

約数和(自身を除く): 29861000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40351, 80702, 161404, 201755, 322808, 403510, 524563, 807020, 1049126, 1614040, 2098252, 2622815, 4196504, 5245630, 10491260, 20982520]

約数ペア:

[(1, 20982520), (2, 10491260), (4, 5245630), (5, 4196504), (8, 2622815), (10, 2098252), (13, 1614040), (20, 1049126), (26, 807020), (40, 524563), (52, 403510), (65, 322808), (104, 201755), (130, 161404), (260, 80702), (520, 40351)]