21120710

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{4391}}^1$

素因数の和:4448

約数の個数: 32

約数和(自身を含む): 42057792

約数和(自身を除く): 20937082

約数列:

[1, 2, 5, 10, 13, 26, 37, 65, 74, 130, 185, 370, 481, 962, 2405, 4391, 4810, 8782, 21955, 43910, 57083, 114166, 162467, 285415, 324934, 570830, 812335, 1624670, 2112071, 4224142, 10560355, 21120710]

約数ペア:

[(1, 21120710), (2, 10560355), (5, 4224142), (10, 2112071), (13, 1624670), (26, 812335), (37, 570830), (65, 324934), (74, 285415), (130, 162467), (185, 114166), (370, 57083), (481, 43910), (962, 21955), (2405, 8782), (4391, 4810)]