20497540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{3571}}^1$

素因数の和:3628

約数の個数: 48

約数和(自身を含む): 50408064

約数和(自身を除く): 29910524

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 70, 82, 140, 164, 205, 287, 410, 574, 820, 1148, 1435, 2870, 3571, 5740, 7142, 14284, 17855, 24997, 35710, 49994, 71420, 99988, 124985, 146411, 249970, 292822, 499940, 585644, 732055, 1024877, 1464110, 2049754, 2928220, 4099508, 5124385, 10248770, 20497540]

約数ペア:

[(1, 20497540), (2, 10248770), (4, 5124385), (5, 4099508), (7, 2928220), (10, 2049754), (14, 1464110), (20, 1024877), (28, 732055), (35, 585644), (41, 499940), (70, 292822), (82, 249970), (140, 146411), (164, 124985), (205, 99988), (287, 71420), (410, 49994), (574, 35710), (820, 24997), (1148, 17855), (1435, 14284), (2870, 7142), (3571, 5740)]