21856220

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{64283}}^1$

素因数の和:64309

約数の個数: 24

約数和(自身を含む): 48598704

約数和(自身を除く): 26742484

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 64283, 128566, 257132, 321415, 642830, 1092811, 1285660, 2185622, 4371244, 5464055, 10928110, 21856220]

約数ペア:

[(1, 21856220), (2, 10928110), (4, 5464055), (5, 4371244), (10, 2185622), (17, 1285660), (20, 1092811), (34, 642830), (68, 321415), (85, 257132), (170, 128566), (340, 64283)]