21686960

素因数分解:

$2^4\times 5^1\times {\mathrm{113}}^1\times {\mathrm{2399}}^1$

素因数の和:2525

約数の個数: 40

約数和(自身を含む): 50889600

約数和(自身を除く): 29202640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 113, 226, 452, 565, 904, 1130, 1808, 2260, 2399, 4520, 4798, 9040, 9596, 11995, 19192, 23990, 38384, 47980, 95960, 191920, 271087, 542174, 1084348, 1355435, 2168696, 2710870, 4337392, 5421740, 10843480, 21686960]

約数ペア:

[(1, 21686960), (2, 10843480), (4, 5421740), (5, 4337392), (8, 2710870), (10, 2168696), (16, 1355435), (20, 1084348), (40, 542174), (80, 271087), (113, 191920), (226, 95960), (452, 47980), (565, 38384), (904, 23990), (1130, 19192), (1808, 11995), (2260, 9596), (2399, 9040), (4520, 4798)]