21235090

素因数分解:

$2^1\times 5^1\times {\mathrm{839}}^1\times {\mathrm{2531}}^1$

素因数の和:3377

約数の個数: 16

約数和(自身を含む): 38283840

約数和(自身を除く): 17048750

約数列:

[1, 2, 5, 10, 839, 1678, 2531, 4195, 5062, 8390, 12655, 25310, 2123509, 4247018, 10617545, 21235090]

約数ペア:

[(1, 21235090), (2, 10617545), (5, 4247018), (10, 2123509), (839, 25310), (1678, 12655), (2531, 8390), (4195, 5062)]