21004885

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{6473}}^1$

素因数の和:6548

約数の個数: 16

約数和(自身を含む): 27967680

約数和(自身を除く): 6962795

約数列:

[1, 5, 11, 55, 59, 295, 649, 3245, 6473, 32365, 71203, 356015, 381907, 1909535, 4200977, 21004885]

約数ペア:

[(1, 21004885), (5, 4200977), (11, 1909535), (55, 381907), (59, 356015), (295, 71203), (649, 32365), (3245, 6473)]