21209757

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{233}}^1\times {\mathrm{1597}}^1$

素因数の和:1852

約数の個数: 16

約数和(自身を含む): 29914560

約数和(自身を除く): 8704803

約数列:

[1, 3, 19, 57, 233, 699, 1597, 4427, 4791, 13281, 30343, 91029, 372101, 1116303, 7069919, 21209757]

約数ペア:

[(1, 21209757), (3, 7069919), (19, 1116303), (57, 372101), (233, 91029), (699, 30343), (1597, 13281), (4427, 4791)]