21286905

素因数分解:

$3^1\times 5^1\times {\mathrm{59}}^1\times {\mathrm{67}}^1\times {\mathrm{359}}^1$

素因数の和:493

約数の個数: 32

約数和(自身を含む): 35251200

約数和(自身を除く): 13964295

約数列:

[1, 3, 5, 15, 59, 67, 177, 201, 295, 335, 359, 885, 1005, 1077, 1795, 3953, 5385, 11859, 19765, 21181, 24053, 59295, 63543, 72159, 105905, 120265, 317715, 360795, 1419127, 4257381, 7095635, 21286905]

約数ペア:

[(1, 21286905), (3, 7095635), (5, 4257381), (15, 1419127), (59, 360795), (67, 317715), (177, 120265), (201, 105905), (295, 72159), (335, 63543), (359, 59295), (885, 24053), (1005, 21181), (1077, 19765), (1795, 11859), (3953, 5385)]