40001980

素因数分解:

$2^2\times 5^1\times {\mathrm{1069}}^1\times {\mathrm{1871}}^1$

素因数の和:2949

約数の個数: 24

約数和(自身を含む): 84127680

約数和(自身を除く): 44125700

約数列:

[1, 2, 4, 5, 10, 20, 1069, 1871, 2138, 3742, 4276, 5345, 7484, 9355, 10690, 18710, 21380, 37420, 2000099, 4000198, 8000396, 10000495, 20000990, 40001980]

約数ペア:

[(1, 40001980), (2, 20000990), (4, 10000495), (5, 8000396), (10, 4000198), (20, 2000099), (1069, 37420), (1871, 21380), (2138, 18710), (3742, 10690), (4276, 9355), (5345, 7484)]