21647180

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26399}}^1$

素因数の和:26449

約数の個数: 24

約数和(自身を含む): 46569600

約数和(自身を除く): 24922420

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26399, 52798, 105596, 131995, 263990, 527980, 1082359, 2164718, 4329436, 5411795, 10823590, 21647180]

約数ペア:

[(1, 21647180), (2, 10823590), (4, 5411795), (5, 4329436), (10, 2164718), (20, 1082359), (41, 527980), (82, 263990), (164, 131995), (205, 105596), (410, 52798), (820, 26399)]