21215710

素因数分解:

$2^1\times 5^1\times {\mathrm{349}}^1\times {\mathrm{6079}}^1$

素因数の和:6435

約数の個数: 16

約数和(自身を含む): 38304000

約数和(自身を除く): 17088290

約数列:

[1, 2, 5, 10, 349, 698, 1745, 3490, 6079, 12158, 30395, 60790, 2121571, 4243142, 10607855, 21215710]

約数ペア:

[(1, 21215710), (2, 10607855), (5, 4243142), (10, 2121571), (349, 60790), (698, 30395), (1745, 12158), (3490, 6079)]