81309020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{312727}}^1$

素因数の和:312749

約数の個数: 24

約数和(自身を含む): 183884064

約数和(自身を除く): 102575044

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 312727, 625454, 1250908, 1563635, 3127270, 4065451, 6254540, 8130902, 16261804, 20327255, 40654510, 81309020]

約数ペア:

[(1, 81309020), (2, 40654510), (4, 20327255), (5, 16261804), (10, 8130902), (13, 6254540), (20, 4065451), (26, 3127270), (52, 1563635), (65, 1250908), (130, 625454), (260, 312727)]