65617220

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{80021}}^1$

素因数の和:80071

約数の個数: 24

約数和(自身を含む): 141158808

約数和(自身を除く): 75541588

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 80021, 160042, 320084, 400105, 800210, 1600420, 3280861, 6561722, 13123444, 16404305, 32808610, 65617220]

約数ペア:

[(1, 65617220), (2, 32808610), (4, 16404305), (5, 13123444), (10, 6561722), (20, 3280861), (41, 1600420), (82, 800210), (164, 400105), (205, 320084), (410, 160042), (820, 80021)]