20339240

素因数分解:

$2^3\times 5^1\times {\mathrm{499}}^1\times {\mathrm{1019}}^1$

素因数の和:1529

約数の個数: 32

約数和(自身を含む): 45900000

約数和(自身を除く): 25560760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499, 998, 1019, 1996, 2038, 2495, 3992, 4076, 4990, 5095, 8152, 9980, 10190, 19960, 20380, 40760, 508481, 1016962, 2033924, 2542405, 4067848, 5084810, 10169620, 20339240]

約数ペア:

[(1, 20339240), (2, 10169620), (4, 5084810), (5, 4067848), (8, 2542405), (10, 2033924), (20, 1016962), (40, 508481), (499, 40760), (998, 20380), (1019, 19960), (1996, 10190), (2038, 9980), (2495, 8152), (3992, 5095), (4076, 4990)]