21047887

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{2131}}^1$

素因数の和:2238

約数の個数: 16

約数和(自身を含む): 25788672

約数和(自身を除く): 4740785

約数列:

[1, 7, 17, 83, 119, 581, 1411, 2131, 9877, 14917, 36227, 176873, 253589, 1238111, 3006841, 21047887]

約数ペア:

[(1, 21047887), (7, 3006841), (17, 1238111), (83, 253589), (119, 176873), (581, 36227), (1411, 14917), (2131, 9877)]