21350475

素因数分解:

$3^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{3061}}^1$

素因数の和:3108

約数の個数: 36

約数和(自身を含む): 39487552

約数和(自身を除く): 18137077

約数列:

[1, 3, 5, 9, 15, 25, 31, 45, 75, 93, 155, 225, 279, 465, 775, 1395, 2325, 3061, 6975, 9183, 15305, 27549, 45915, 76525, 94891, 137745, 229575, 284673, 474455, 688725, 854019, 1423365, 2372275, 4270095, 7116825, 21350475]

約数ペア:

[(1, 21350475), (3, 7116825), (5, 4270095), (9, 2372275), (15, 1423365), (25, 854019), (31, 688725), (45, 474455), (75, 284673), (93, 229575), (155, 137745), (225, 94891), (279, 76525), (465, 45915), (775, 27549), (1395, 15305), (2325, 9183), (3061, 6975)]