21771555

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{311}}^1\times {\mathrm{359}}^1$

素因数の和:691

約数の個数: 32

約数和(自身を含む): 37739520

約数和(自身を除く): 15967965

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 311, 359, 933, 1077, 1555, 1795, 4043, 4665, 4667, 5385, 12129, 14001, 20215, 23335, 60645, 70005, 111649, 334947, 558245, 1451437, 1674735, 4354311, 7257185, 21771555]

約数ペア:

[(1, 21771555), (3, 7257185), (5, 4354311), (13, 1674735), (15, 1451437), (39, 558245), (65, 334947), (195, 111649), (311, 70005), (359, 60645), (933, 23335), (1077, 20215), (1555, 14001), (1795, 12129), (4043, 5385), (4665, 4667)]