21379085

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2473}}^1$

素因数の和:2517

約数の個数: 32

約数和(自身を含む): 33250560

約数和(自身を除く): 11871475

約数列:

[1, 5, 7, 13, 19, 35, 65, 91, 95, 133, 247, 455, 665, 1235, 1729, 2473, 8645, 12365, 17311, 32149, 46987, 86555, 160745, 225043, 234935, 328909, 610831, 1125215, 1644545, 3054155, 4275817, 21379085]

約数ペア:

[(1, 21379085), (5, 4275817), (7, 3054155), (13, 1644545), (19, 1125215), (35, 610831), (65, 328909), (91, 234935), (95, 225043), (133, 160745), (247, 86555), (455, 46987), (665, 32149), (1235, 17311), (1729, 12365), (2473, 8645)]