21005931

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{223}}^1\times {\mathrm{1847}}^1$

素因数の和:2090

約数の個数: 16

約数和(自身を含む): 29804544

約数和(自身を除く): 8798613

約数列:

[1, 3, 17, 51, 223, 669, 1847, 3791, 5541, 11373, 31399, 94197, 411881, 1235643, 7001977, 21005931]

約数ペア:

[(1, 21005931), (3, 7001977), (17, 1235643), (51, 411881), (223, 94197), (669, 31399), (1847, 11373), (3791, 5541)]