128760980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{207679}}^1$

素因数の和:207719

約数の個数: 24

約数和(自身を含む): 279121920

約数和(自身を除く): 150360940

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 207679, 415358, 830716, 1038395, 2076790, 4153580, 6438049, 12876098, 25752196, 32190245, 64380490, 128760980]

約数ペア:

[(1, 128760980), (2, 64380490), (4, 32190245), (5, 25752196), (10, 12876098), (20, 6438049), (31, 4153580), (62, 2076790), (124, 1038395), (155, 830716), (310, 415358), (620, 207679)]