20880980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{33679}}^1$

素因数の和:33719

約数の個数: 24

約数和(自身を含む): 45265920

約数和(自身を除く): 24384940

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 33679, 67358, 134716, 168395, 336790, 673580, 1044049, 2088098, 4176196, 5220245, 10440490, 20880980]

約数ペア:

[(1, 20880980), (2, 10440490), (4, 5220245), (5, 4176196), (10, 2088098), (20, 1044049), (31, 673580), (62, 336790), (124, 168395), (155, 134716), (310, 67358), (620, 33679)]