21855855

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{1277}}^1$

素因数の和:1455

約数の個数: 32

約数和(自身を含む): 40241664

約数和(自身を除く): 18385809

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 163, 489, 815, 1141, 1277, 2445, 3423, 3831, 5705, 6385, 8939, 17115, 19155, 26817, 44695, 134085, 208151, 624453, 1040755, 1457057, 3122265, 4371171, 7285285, 21855855]

約数ペア:

[(1, 21855855), (3, 7285285), (5, 4371171), (7, 3122265), (15, 1457057), (21, 1040755), (35, 624453), (105, 208151), (163, 134085), (489, 44695), (815, 26817), (1141, 19155), (1277, 17115), (2445, 8939), (3423, 6385), (3831, 5705)]