19901271

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{2309}}^1$

素因数の和:2355

約数の個数: 24

約数和(自身を含む): 30436560

約数和(自身を除く): 10535289

約数列:

[1, 3, 13, 17, 39, 51, 169, 221, 507, 663, 2309, 2873, 6927, 8619, 30017, 39253, 90051, 117759, 390221, 510289, 1170663, 1530867, 6633757, 19901271]

約数ペア:

[(1, 19901271), (3, 6633757), (13, 1530867), (17, 1170663), (39, 510289), (51, 390221), (169, 117759), (221, 90051), (507, 39253), (663, 30017), (2309, 8619), (2873, 6927)]