21210315

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{2557}}^1$

素因数の和:2651

約数の個数: 32

約数和(自身を含む): 39290880

約数和(自身を除く): 18080565

約数列:

[1, 3, 5, 7, 15, 21, 35, 79, 105, 237, 395, 553, 1185, 1659, 2557, 2765, 7671, 8295, 12785, 17899, 38355, 53697, 89495, 202003, 268485, 606009, 1010015, 1414021, 3030045, 4242063, 7070105, 21210315]

約数ペア:

[(1, 21210315), (3, 7070105), (5, 4242063), (7, 3030045), (15, 1414021), (21, 1010015), (35, 606009), (79, 268485), (105, 202003), (237, 89495), (395, 53697), (553, 38355), (1185, 17899), (1659, 12785), (2557, 8295), (2765, 7671)]