21909615

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{2293}}^1$

素因数の和:2328

約数の個数: 48

約数和(自身を含む): 43934688

約数和(自身を除く): 22025073

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 49, 65, 91, 105, 147, 195, 245, 273, 455, 637, 735, 1365, 1911, 2293, 3185, 6879, 9555, 11465, 16051, 29809, 34395, 48153, 80255, 89427, 112357, 149045, 208663, 240765, 337071, 447135, 561785, 625989, 1043315, 1460641, 1685355, 3129945, 4381923, 7303205, 21909615]

約数ペア:

[(1, 21909615), (3, 7303205), (5, 4381923), (7, 3129945), (13, 1685355), (15, 1460641), (21, 1043315), (35, 625989), (39, 561785), (49, 447135), (65, 337071), (91, 240765), (105, 208663), (147, 149045), (195, 112357), (245, 89427), (273, 80255), (455, 48153), (637, 34395), (735, 29809), (1365, 16051), (1911, 11465), (2293, 9555), (3185, 6879)]