87980420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{399911}}^1$

素因数の和:399931

約数の個数: 24

約数和(自身を含む): 201555648

約数和(自身を除く): 113575228

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 399911, 799822, 1599644, 1999555, 3999110, 4399021, 7998220, 8798042, 17596084, 21995105, 43990210, 87980420]

約数ペア:

[(1, 87980420), (2, 43990210), (4, 21995105), (5, 17596084), (10, 8798042), (11, 7998220), (20, 4399021), (22, 3999110), (44, 1999555), (55, 1599644), (110, 799822), (220, 399911)]