21018655390

素因数分解:

$2^1\times 5^1\times {\mathrm{3121}}^1\times {\mathrm{673459}}^1$

素因数の和:676587

約数の個数: 16

約数和(自身を含む): 37845758160

約数和(自身を除く): 16827102770

約数列:

[1, 2, 5, 10, 3121, 6242, 15605, 31210, 673459, 1346918, 3367295, 6734590, 2101865539, 4203731078, 10509327695, 21018655390]

約数ペア:

[(1, 21018655390), (2, 10509327695), (5, 4203731078), (10, 2101865539), (3121, 6734590), (6242, 3367295), (15605, 1346918), (31210, 673459)]