81267040

素因数分解:

$2^5\times 5^1\times {\mathrm{507919}}^1$

素因数の和:507934

約数の個数: 24

約数和(自身を含む): 191993760

約数和(自身を除く): 110726720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 507919, 1015838, 2031676, 2539595, 4063352, 5079190, 8126704, 10158380, 16253408, 20316760, 40633520, 81267040]

約数ペア:

[(1, 81267040), (2, 40633520), (4, 20316760), (5, 16253408), (8, 10158380), (10, 8126704), (16, 5079190), (20, 4063352), (32, 2539595), (40, 2031676), (80, 1015838), (160, 507919)]