21559120

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{24499}}^1$

素因数の和:24523

約数の個数: 40

約数和(自身を含む): 54684000

約数和(自身を除く): 33124880

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 24499, 48998, 97996, 122495, 195992, 244990, 269489, 391984, 489980, 538978, 979960, 1077956, 1347445, 1959920, 2155912, 2694890, 4311824, 5389780, 10779560, 21559120]

約数ペア:

[(1, 21559120), (2, 10779560), (4, 5389780), (5, 4311824), (8, 2694890), (10, 2155912), (11, 1959920), (16, 1347445), (20, 1077956), (22, 979960), (40, 538978), (44, 489980), (55, 391984), (80, 269489), (88, 244990), (110, 195992), (176, 122495), (220, 97996), (440, 48998), (880, 24499)]