81358160

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78229}}^1$

素因数の和:78255

約数の個数: 40

約数和(自身を含む): 203710920

約数和(自身を除く): 122352760

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 78229, 156458, 312916, 391145, 625832, 782290, 1016977, 1251664, 1564580, 2033954, 3129160, 4067908, 5084885, 6258320, 8135816, 10169770, 16271632, 20339540, 40679080, 81358160]

約数ペア:

[(1, 81358160), (2, 40679080), (4, 20339540), (5, 16271632), (8, 10169770), (10, 8135816), (13, 6258320), (16, 5084885), (20, 4067908), (26, 3129160), (40, 2033954), (52, 1564580), (65, 1251664), (80, 1016977), (104, 782290), (130, 625832), (208, 391145), (260, 312916), (520, 156458), (1040, 78229)]