13130980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{21179}}^1$

素因数の和:21219

約数の個数: 24

約数和(自身を含む): 28465920

約数和(自身を除く): 15334940

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 21179, 42358, 84716, 105895, 211790, 423580, 656549, 1313098, 2626196, 3282745, 6565490, 13130980]

約数ペア:

[(1, 13130980), (2, 6565490), (4, 3282745), (5, 2626196), (10, 1313098), (20, 656549), (31, 423580), (62, 211790), (124, 105895), (155, 84716), (310, 42358), (620, 21179)]