81019220

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{22381}}^1$

素因数の和:22571

約数の個数: 24

約数和(自身を含む): 171088008

約数和(自身を除く): 90068788

約数列:

[1, 2, 4, 5, 10, 20, 181, 362, 724, 905, 1810, 3620, 22381, 44762, 89524, 111905, 223810, 447620, 4050961, 8101922, 16203844, 20254805, 40509610, 81019220]

約数ペア:

[(1, 81019220), (2, 40509610), (4, 20254805), (5, 16203844), (10, 8101922), (20, 4050961), (181, 447620), (362, 223810), (724, 111905), (905, 89524), (1810, 44762), (3620, 22381)]