21787420

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{35141}}^1$

素因数の和:35181

約数の個数: 24

約数和(自身を含む): 47230848

約数和(自身を除く): 25443428

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 35141, 70282, 140564, 175705, 351410, 702820, 1089371, 2178742, 4357484, 5446855, 10893710, 21787420]

約数ペア:

[(1, 21787420), (2, 10893710), (4, 5446855), (5, 4357484), (10, 2178742), (20, 1089371), (31, 702820), (62, 351410), (124, 175705), (155, 140564), (310, 70282), (620, 35141)]