21750157

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{389}}^1$

素因数の和:453

約数の個数: 32

約数和(自身を含む): 28304640

約数和(自身を除く): 6554483

約数列:

[1, 11, 13, 17, 23, 143, 187, 221, 253, 299, 389, 391, 2431, 3289, 4279, 4301, 5057, 5083, 6613, 8947, 55627, 55913, 72743, 85969, 98417, 116311, 152099, 945659, 1279421, 1673089, 1977287, 21750157]

約数ペア:

[(1, 21750157), (11, 1977287), (13, 1673089), (17, 1279421), (23, 945659), (143, 152099), (187, 116311), (221, 98417), (253, 85969), (299, 72743), (389, 55913), (391, 55627), (2431, 8947), (3289, 6613), (4279, 5083), (4301, 5057)]