21191665

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{313}}^1\times {\mathrm{1231}}^1$

素因数の和:1560

約数の個数: 16

約数和(自身を含む): 27853056

約数和(自身を除く): 6661391

約数列:

[1, 5, 11, 55, 313, 1231, 1565, 3443, 6155, 13541, 17215, 67705, 385303, 1926515, 4238333, 21191665]

約数ペア:

[(1, 21191665), (5, 4238333), (11, 1926515), (55, 385303), (313, 67705), (1231, 17215), (1565, 13541), (3443, 6155)]