64426580

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{78569}}^1$

素因数の和:78619

約数の個数: 24

約数和(自身を含む): 138597480

約数和(自身を除く): 74170900

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 78569, 157138, 314276, 392845, 785690, 1571380, 3221329, 6442658, 12885316, 16106645, 32213290, 64426580]

約数ペア:

[(1, 64426580), (2, 32213290), (4, 16106645), (5, 12885316), (10, 6442658), (20, 3221329), (41, 1571380), (82, 785690), (164, 392845), (205, 314276), (410, 157138), (820, 78569)]