19664420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{23981}}^1$

素因数の和:24031

約数の個数: 24

約数和(自身を含む): 42304248

約数和(自身を除く): 22639828

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 23981, 47962, 95924, 119905, 239810, 479620, 983221, 1966442, 3932884, 4916105, 9832210, 19664420]

約数ペア:

[(1, 19664420), (2, 9832210), (4, 4916105), (5, 3932884), (10, 1966442), (20, 983221), (41, 479620), (82, 239810), (164, 119905), (205, 95924), (410, 47962), (820, 23981)]