21456645

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{1129}}^1$

素因数の和:1325

約数の個数: 32

約数和(自身を含む): 39486720

約数和(自身を除く): 18030075

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 181, 543, 905, 1129, 1267, 2715, 3387, 3801, 5645, 6335, 7903, 16935, 19005, 23709, 39515, 118545, 204349, 613047, 1021745, 1430443, 3065235, 4291329, 7152215, 21456645]

約数ペア:

[(1, 21456645), (3, 7152215), (5, 4291329), (7, 3065235), (15, 1430443), (21, 1021745), (35, 613047), (105, 204349), (181, 118545), (543, 39515), (905, 23709), (1129, 19005), (1267, 16935), (2715, 7903), (3387, 6335), (3801, 5645)]