21245445

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1579}}^1$

素因数の和:1626

約数の個数: 48

約数和(自身を含む): 41408640

約数和(自身を除く): 20163195

約数列:

[1, 3, 5, 9, 13, 15, 23, 39, 45, 65, 69, 115, 117, 195, 207, 299, 345, 585, 897, 1035, 1495, 1579, 2691, 4485, 4737, 7895, 13455, 14211, 20527, 23685, 36317, 61581, 71055, 102635, 108951, 181585, 184743, 307905, 326853, 472121, 544755, 923715, 1416363, 1634265, 2360605, 4249089, 7081815, 21245445]

約数ペア:

[(1, 21245445), (3, 7081815), (5, 4249089), (9, 2360605), (13, 1634265), (15, 1416363), (23, 923715), (39, 544755), (45, 472121), (65, 326853), (69, 307905), (115, 184743), (117, 181585), (195, 108951), (207, 102635), (299, 71055), (345, 61581), (585, 36317), (897, 23685), (1035, 20527), (1495, 14211), (1579, 13455), (2691, 7895), (4485, 4737)]