8020420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{9781}}^1$

素因数の和:9831

約数の個数: 24

約数和(自身を含む): 17255448

約数和(自身を除く): 9235028

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 9781, 19562, 39124, 48905, 97810, 195620, 401021, 802042, 1604084, 2005105, 4010210, 8020420]

約数ペア:

[(1, 8020420), (2, 4010210), (4, 2005105), (5, 1604084), (10, 802042), (20, 401021), (41, 195620), (82, 97810), (164, 48905), (205, 39124), (410, 19562), (820, 9781)]