81015980

素因数分解:

$2^2\times 5^1\times {\mathrm{1031}}^1\times {\mathrm{3929}}^1$

素因数の和:4969

約数の個数: 24

約数和(自身を含む): 170341920

約数和(自身を除く): 89325940

約数列:

[1, 2, 4, 5, 10, 20, 1031, 2062, 3929, 4124, 5155, 7858, 10310, 15716, 19645, 20620, 39290, 78580, 4050799, 8101598, 16203196, 20253995, 40507990, 81015980]

約数ペア:

[(1, 81015980), (2, 40507990), (4, 20253995), (5, 16203196), (10, 8101598), (20, 4050799), (1031, 78580), (2062, 39290), (3929, 20620), (4124, 19645), (5155, 15716), (7858, 10310)]