81378575

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 112644576

約数和(自身を除く): 31266001

約数列:

[1, 5, 17, 25, 43, 61, 73, 85, 215, 305, 365, 425, 731, 1037, 1075, 1241, 1525, 1825, 2623, 3139, 3655, 4453, 5185, 6205, 13115, 15695, 18275, 22265, 25925, 31025, 44591, 53363, 65575, 75701, 78475, 111325, 191479, 222955, 266815, 378505, 957395, 1114775, 1334075, 1892525, 3255143, 4786975, 16275715, 81378575]

約数ペア:

[(1, 81378575), (5, 16275715), (17, 4786975), (25, 3255143), (43, 1892525), (61, 1334075), (73, 1114775), (85, 957395), (215, 378505), (305, 266815), (365, 222955), (425, 191479), (731, 111325), (1037, 78475), (1075, 75701), (1241, 65575), (1525, 53363), (1825, 44591), (2623, 31025), (3139, 25925), (3655, 22265), (4453, 18275), (5185, 15695), (6205, 13115)]