13217780

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{21319}}^1$

素因数の和:21359

約数の個数: 24

約数和(自身を含む): 28654080

約数和(自身を除く): 15436300

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 21319, 42638, 85276, 106595, 213190, 426380, 660889, 1321778, 2643556, 3304445, 6608890, 13217780]

約数ペア:

[(1, 13217780), (2, 6608890), (4, 3304445), (5, 2643556), (10, 1321778), (20, 660889), (31, 426380), (62, 213190), (124, 106595), (155, 85276), (310, 42638), (620, 21319)]