21687285

素因数分解:

$3^1\times 5^1\times {\mathrm{971}}^1\times {\mathrm{1489}}^1$

素因数の和:2468

約数の個数: 16

約数和(自身を含む): 34758720

約数和(自身を除く): 13071435

約数列:

[1, 3, 5, 15, 971, 1489, 2913, 4467, 4855, 7445, 14565, 22335, 1445819, 4337457, 7229095, 21687285]

約数ペア:

[(1, 21687285), (3, 7229095), (5, 4337457), (15, 1445819), (971, 22335), (1489, 14565), (2913, 7445), (4467, 4855)]