21561585

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{521}}^1$

素因数の和:649

約数の個数: 32

約数和(自身を含む): 36080640

約数和(自身を除く): 14519055

約数列:

[1, 3, 5, 15, 31, 89, 93, 155, 267, 445, 465, 521, 1335, 1563, 2605, 2759, 7815, 8277, 13795, 16151, 41385, 46369, 48453, 80755, 139107, 231845, 242265, 695535, 1437439, 4312317, 7187195, 21561585]

約数ペア:

[(1, 21561585), (3, 7187195), (5, 4312317), (15, 1437439), (31, 695535), (89, 242265), (93, 231845), (155, 139107), (267, 80755), (445, 48453), (465, 46369), (521, 41385), (1335, 16151), (1563, 13795), (2605, 8277), (2759, 7815)]