80496820

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{65981}}^1$

素因数の和:66051

約数の個数: 24

約数和(自身を含む): 171817128

約数和(自身を除く): 91320308

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 65981, 131962, 263924, 329905, 659810, 1319620, 4024841, 8049682, 16099364, 20124205, 40248410, 80496820]

約数ペア:

[(1, 80496820), (2, 40248410), (4, 20124205), (5, 16099364), (10, 8049682), (20, 4024841), (61, 1319620), (122, 659810), (244, 329905), (305, 263924), (610, 131962), (1220, 65981)]