8003960

素因数分解:

$2^3\times 5^1\times {\mathrm{401}}^1\times {\mathrm{499}}^1$

素因数の和:911

約数の個数: 32

約数和(自身を含む): 18090000

約数和(自身を除く): 10086040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 401, 499, 802, 998, 1604, 1996, 2005, 2495, 3208, 3992, 4010, 4990, 8020, 9980, 16040, 19960, 200099, 400198, 800396, 1000495, 1600792, 2000990, 4001980, 8003960]

約数ペア:

[(1, 8003960), (2, 4001980), (4, 2000990), (5, 1600792), (8, 1000495), (10, 800396), (20, 400198), (40, 200099), (401, 19960), (499, 16040), (802, 9980), (998, 8020), (1604, 4990), (1996, 4010), (2005, 3992), (2495, 3208)]