21786580

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{163}}^2$

素因数の和:376

約数の個数: 36

約数和(自身を含む): 47157012

約数和(自身を除く): 25370432

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 163, 164, 205, 326, 410, 652, 815, 820, 1630, 3260, 6683, 13366, 26569, 26732, 33415, 53138, 66830, 106276, 132845, 133660, 265690, 531380, 1089329, 2178658, 4357316, 5446645, 10893290, 21786580]

約数ペア:

[(1, 21786580), (2, 10893290), (4, 5446645), (5, 4357316), (10, 2178658), (20, 1089329), (41, 531380), (82, 265690), (163, 133660), (164, 132845), (205, 106276), (326, 66830), (410, 53138), (652, 33415), (815, 26732), (820, 26569), (1630, 13366), (3260, 6683)]