90831280

素因数分解:

$2^4\times 5^1\times {\mathrm{211}}^1\times {\mathrm{5381}}^1$

素因数の和:5605

約数の個数: 40

約数和(自身を含む): 212223024

約数和(自身を除く): 121391744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 211, 422, 844, 1055, 1688, 2110, 3376, 4220, 5381, 8440, 10762, 16880, 21524, 26905, 43048, 53810, 86096, 107620, 215240, 430480, 1135391, 2270782, 4541564, 5676955, 9083128, 11353910, 18166256, 22707820, 45415640, 90831280]

約数ペア:

[(1, 90831280), (2, 45415640), (4, 22707820), (5, 18166256), (8, 11353910), (10, 9083128), (16, 5676955), (20, 4541564), (40, 2270782), (80, 1135391), (211, 430480), (422, 215240), (844, 107620), (1055, 86096), (1688, 53810), (2110, 43048), (3376, 26905), (4220, 21524), (5381, 16880), (8440, 10762)]