21685275

素因数分解:

$3^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{3109}}^1$

素因数の和:3156

約数の個数: 36

約数和(自身を含む): 40106560

約数和(自身を除く): 18421285

約数列:

[1, 3, 5, 9, 15, 25, 31, 45, 75, 93, 155, 225, 279, 465, 775, 1395, 2325, 3109, 6975, 9327, 15545, 27981, 46635, 77725, 96379, 139905, 233175, 289137, 481895, 699525, 867411, 1445685, 2409475, 4337055, 7228425, 21685275]

約数ペア:

[(1, 21685275), (3, 7228425), (5, 4337055), (9, 2409475), (15, 1445685), (25, 867411), (31, 699525), (45, 481895), (75, 289137), (93, 233175), (155, 139905), (225, 96379), (279, 77725), (465, 46635), (775, 27981), (1395, 15545), (2325, 9327), (3109, 6975)]