21791440

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{24763}}^1$

素因数の和:24787

約数の個数: 40

約数和(自身を含む): 55273248

約数和(自身を除く): 33481808

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 24763, 49526, 99052, 123815, 198104, 247630, 272393, 396208, 495260, 544786, 990520, 1089572, 1361965, 1981040, 2179144, 2723930, 4358288, 5447860, 10895720, 21791440]

約数ペア:

[(1, 21791440), (2, 10895720), (4, 5447860), (5, 4358288), (8, 2723930), (10, 2179144), (11, 1981040), (16, 1361965), (20, 1089572), (22, 990520), (40, 544786), (44, 495260), (55, 396208), (80, 272393), (88, 247630), (110, 198104), (176, 123815), (220, 99052), (440, 49526), (880, 24763)]