21173643

素因数分解:

$3^4\times {\mathrm{173}}^1\times {\mathrm{1511}}^1$

素因数の和:1696

約数の個数: 20

約数和(自身を含む): 31833648

約数和(自身を除く): 10660005

約数列:

[1, 3, 9, 27, 81, 173, 519, 1511, 1557, 4533, 4671, 13599, 14013, 40797, 122391, 261403, 784209, 2352627, 7057881, 21173643]

約数ペア:

[(1, 21173643), (3, 7057881), (9, 2352627), (27, 784209), (81, 261403), (173, 122391), (519, 40797), (1511, 14013), (1557, 13599), (4533, 4671)]