21906280

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{49787}}^1$

素因数の和:49809

約数の個数: 32

約数和(自身を含む): 53771040

約数和(自身を除く): 31864760

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 49787, 99574, 199148, 248935, 398296, 497870, 547657, 995740, 1095314, 1991480, 2190628, 2738285, 4381256, 5476570, 10953140, 21906280]

約数ペア:

[(1, 21906280), (2, 10953140), (4, 5476570), (5, 4381256), (8, 2738285), (10, 2190628), (11, 1991480), (20, 1095314), (22, 995740), (40, 547657), (44, 497870), (55, 398296), (88, 248935), (110, 199148), (220, 99574), (440, 49787)]