21137831

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{2789}}^1$

素因数の和:2866

約数の個数: 16

約数和(自身を含む): 25310880

約数和(自身を除く): 4173049

約数列:

[1, 11, 13, 53, 143, 583, 689, 2789, 7579, 30679, 36257, 147817, 398827, 1625987, 1921621, 21137831]

約数ペア:

[(1, 21137831), (11, 1921621), (13, 1625987), (53, 398827), (143, 147817), (583, 36257), (689, 30679), (2789, 7579)]