81389360

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78259}}^1$

素因数の和:78285

約数の個数: 40

約数和(自身を含む): 203789040

約数和(自身を除く): 122399680

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 78259, 156518, 313036, 391295, 626072, 782590, 1017367, 1252144, 1565180, 2034734, 3130360, 4069468, 5086835, 6260720, 8138936, 10173670, 16277872, 20347340, 40694680, 81389360]

約数ペア:

[(1, 81389360), (2, 40694680), (4, 20347340), (5, 16277872), (8, 10173670), (10, 8138936), (13, 6260720), (16, 5086835), (20, 4069468), (26, 3130360), (40, 2034734), (52, 1565180), (65, 1252144), (80, 1017367), (104, 782590), (130, 626072), (208, 391295), (260, 313036), (520, 156518), (1040, 78259)]