21193215

素因数分解:

$3^1\times 5^1\times {\mathrm{137}}^1\times {\mathrm{10313}}^1$

素因数の和:10458

約数の個数: 16

約数和(自身を含む): 34159968

約数和(自身を除く): 12966753

約数列:

[1, 3, 5, 15, 137, 411, 685, 2055, 10313, 30939, 51565, 154695, 1412881, 4238643, 7064405, 21193215]

約数ペア:

[(1, 21193215), (3, 7064405), (5, 4238643), (15, 1412881), (137, 154695), (411, 51565), (685, 30939), (2055, 10313)]