39311980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{139}}^1\times {\mathrm{179}}^1$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 84672000

約数和(自身を除く): 45360020

約数列:

[1, 2, 4, 5, 10, 20, 79, 139, 158, 179, 278, 316, 358, 395, 556, 695, 716, 790, 895, 1390, 1580, 1790, 2780, 3580, 10981, 14141, 21962, 24881, 28282, 43924, 49762, 54905, 56564, 70705, 99524, 109810, 124405, 141410, 219620, 248810, 282820, 497620, 1965599, 3931198, 7862396, 9827995, 19655990, 39311980]

約数ペア:

[(1, 39311980), (2, 19655990), (4, 9827995), (5, 7862396), (10, 3931198), (20, 1965599), (79, 497620), (139, 282820), (158, 248810), (179, 219620), (278, 141410), (316, 124405), (358, 109810), (395, 99524), (556, 70705), (695, 56564), (716, 54905), (790, 49762), (895, 43924), (1390, 28282), (1580, 24881), (1790, 21962), (2780, 14141), (3580, 10981)]