21195778

素因数分解:

$2^1\times {\mathrm{47}}^1\times {\mathrm{443}}^1\times {\mathrm{509}}^1$

素因数の和:1001

約数の個数: 16

約数和(自身を含む): 32607360

約数和(自身を除く): 11411582

約数列:

[1, 2, 47, 94, 443, 509, 886, 1018, 20821, 23923, 41642, 47846, 225487, 450974, 10597889, 21195778]

約数ペア:

[(1, 21195778), (2, 10597889), (47, 450974), (94, 225487), (443, 47846), (509, 41642), (886, 23923), (1018, 20821)]