21156355

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{3529}}^1$

素因数の和:3654

約数の個数: 16

約数和(自身を含む): 27957600

約数和(自身を除く): 6801245

約数列:

[1, 5, 11, 55, 109, 545, 1199, 3529, 5995, 17645, 38819, 194095, 384661, 1923305, 4231271, 21156355]

約数ペア:

[(1, 21156355), (5, 4231271), (11, 1923305), (55, 384661), (109, 194095), (545, 38819), (1199, 17645), (3529, 5995)]