128464360

素因数分解:

$2^3\times 5^1\times {\mathrm{401}}^1\times {\mathrm{8009}}^1$

素因数の和:8421

約数の個数: 32

約数和(自身を含む): 289801800

約数和(自身を除く): 161337440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 401, 802, 1604, 2005, 3208, 4010, 8009, 8020, 16018, 16040, 32036, 40045, 64072, 80090, 160180, 320360, 3211609, 6423218, 12846436, 16058045, 25692872, 32116090, 64232180, 128464360]

約数ペア:

[(1, 128464360), (2, 64232180), (4, 32116090), (5, 25692872), (8, 16058045), (10, 12846436), (20, 6423218), (40, 3211609), (401, 320360), (802, 160180), (1604, 80090), (2005, 64072), (3208, 40045), (4010, 32036), (8009, 16040), (8020, 16018)]