19812640

素因数分解:

$2^5\times 5^1\times {\mathrm{123829}}^1$

素因数の和:123844

約数の個数: 24

約数和(自身を含む): 46807740

約数和(自身を除く): 26995100

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 123829, 247658, 495316, 619145, 990632, 1238290, 1981264, 2476580, 3962528, 4953160, 9906320, 19812640]

約数ペア:

[(1, 19812640), (2, 9906320), (4, 4953160), (5, 3962528), (8, 2476580), (10, 1981264), (16, 1238290), (20, 990632), (32, 619145), (40, 495316), (80, 247658), (160, 123829)]