21804760

素因数分解:

$2^3\times 5^1\times {\mathrm{419}}^1\times {\mathrm{1301}}^1$

素因数の和:1731

約数の個数: 32

約数和(自身を含む): 49215600

約数和(自身を除く): 27410840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 419, 838, 1301, 1676, 2095, 2602, 3352, 4190, 5204, 6505, 8380, 10408, 13010, 16760, 26020, 52040, 545119, 1090238, 2180476, 2725595, 4360952, 5451190, 10902380, 21804760]

約数ペア:

[(1, 21804760), (2, 10902380), (4, 5451190), (5, 4360952), (8, 2725595), (10, 2180476), (20, 1090238), (40, 545119), (419, 52040), (838, 26020), (1301, 16760), (1676, 13010), (2095, 10408), (2602, 8380), (3352, 6505), (4190, 5204)]