21719931

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{3251}}^1$

素因数の和:3402

約数の個数: 16

約数和(自身を含む): 30907008

約数和(自身を除く): 9187077

約数列:

[1, 3, 17, 51, 131, 393, 2227, 3251, 6681, 9753, 55267, 165801, 425881, 1277643, 7239977, 21719931]

約数ペア:

[(1, 21719931), (3, 7239977), (17, 1277643), (51, 425881), (131, 165801), (393, 55267), (2227, 9753), (3251, 6681)]