21009968

素因数分解:

$2^4\times 7^1\times {\mathrm{109}}^1\times {\mathrm{1721}}^1$

素因数の和:1845

約数の個数: 40

約数和(自身を含む): 46976160

約数和(自身を除く): 25966192

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 109, 112, 218, 436, 763, 872, 1526, 1721, 1744, 3052, 3442, 6104, 6884, 12047, 12208, 13768, 24094, 27536, 48188, 96376, 187589, 192752, 375178, 750356, 1313123, 1500712, 2626246, 3001424, 5252492, 10504984, 21009968]

約数ペア:

[(1, 21009968), (2, 10504984), (4, 5252492), (7, 3001424), (8, 2626246), (14, 1500712), (16, 1313123), (28, 750356), (56, 375178), (109, 192752), (112, 187589), (218, 96376), (436, 48188), (763, 27536), (872, 24094), (1526, 13768), (1721, 12208), (1744, 12047), (3052, 6884), (3442, 6104)]