81295820

素因数分解:

$2^2\times 5^1\times {\mathrm{1019}}^1\times {\mathrm{3989}}^1$

素因数の和:5017

約数の個数: 24

約数和(自身を含む): 170931600

約数和(自身を除く): 89635780

約数列:

[1, 2, 4, 5, 10, 20, 1019, 2038, 3989, 4076, 5095, 7978, 10190, 15956, 19945, 20380, 39890, 79780, 4064791, 8129582, 16259164, 20323955, 40647910, 81295820]

約数ペア:

[(1, 81295820), (2, 40647910), (4, 20323955), (5, 16259164), (10, 8129582), (20, 4064791), (1019, 79780), (2038, 39890), (3989, 20380), (4076, 19945), (5095, 15956), (7978, 10190)]