858991820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1047551}}^1$

素因数の和:1047601

約数の個数: 24

約数和(自身を含む): 1847881728

約数和(自身を除く): 988889908

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 1047551, 2095102, 4190204, 5237755, 10475510, 20951020, 42949591, 85899182, 171798364, 214747955, 429495910, 858991820]

約数ペア:

[(1, 858991820), (2, 429495910), (4, 214747955), (5, 171798364), (10, 85899182), (20, 42949591), (41, 20951020), (82, 10475510), (164, 5237755), (205, 4190204), (410, 2095102), (820, 1047551)]