81985580

素因数分解:

$2^2\times 5^1\times {\mathrm{179}}^1\times {\mathrm{22901}}^1$

素因数の和:23089

約数の個数: 24

約数和(自身を含む): 173139120

約数和(自身を除く): 91153540

約数列:

[1, 2, 4, 5, 10, 20, 179, 358, 716, 895, 1790, 3580, 22901, 45802, 91604, 114505, 229010, 458020, 4099279, 8198558, 16397116, 20496395, 40992790, 81985580]

約数ペア:

[(1, 81985580), (2, 40992790), (4, 20496395), (5, 16397116), (10, 8198558), (20, 4099279), (179, 458020), (358, 229010), (716, 114505), (895, 91604), (1790, 45802), (3580, 22901)]