18877220

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{23021}}^1$

素因数の和:23071

約数の個数: 24

約数和(自身を含む): 40610808

約数和(自身を除く): 21733588

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 23021, 46042, 92084, 115105, 230210, 460420, 943861, 1887722, 3775444, 4719305, 9438610, 18877220]

約数ペア:

[(1, 18877220), (2, 9438610), (4, 4719305), (5, 3775444), (10, 1887722), (20, 943861), (41, 460420), (82, 230210), (164, 115105), (205, 92084), (410, 46042), (820, 23021)]