81365180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{312943}}^1$

素因数の和:312965

約数の個数: 24

約数和(自身を含む): 184011072

約数和(自身を除く): 102645892

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 312943, 625886, 1251772, 1564715, 3129430, 4068259, 6258860, 8136518, 16273036, 20341295, 40682590, 81365180]

約数ペア:

[(1, 81365180), (2, 40682590), (4, 20341295), (5, 16273036), (10, 8136518), (13, 6258860), (20, 4068259), (26, 3129430), (52, 1564715), (65, 1251772), (130, 625886), (260, 312943)]