21952020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{569}}^1\times {\mathrm{643}}^1$

素因数の和:1224

約数の個数: 48

約数和(自身を含む): 61669440

約数和(自身を除く): 39717420

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 569, 643, 1138, 1286, 1707, 1929, 2276, 2572, 2845, 3215, 3414, 3858, 5690, 6430, 6828, 7716, 8535, 9645, 11380, 12860, 17070, 19290, 34140, 38580, 365867, 731734, 1097601, 1463468, 1829335, 2195202, 3658670, 4390404, 5488005, 7317340, 10976010, 21952020]

約数ペア:

[(1, 21952020), (2, 10976010), (3, 7317340), (4, 5488005), (5, 4390404), (6, 3658670), (10, 2195202), (12, 1829335), (15, 1463468), (20, 1097601), (30, 731734), (60, 365867), (569, 38580), (643, 34140), (1138, 19290), (1286, 17070), (1707, 12860), (1929, 11380), (2276, 9645), (2572, 8535), (2845, 7716), (3215, 6828), (3414, 6430), (3858, 5690)]