21096585

素因数分解:

$3^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^2$

素因数の和:187

約数の個数: 48

約数和(自身を含む): 39267840

約数和(自身を除く): 18171255

約数列:

[1, 3, 5, 9, 15, 27, 31, 45, 71, 93, 135, 155, 213, 279, 355, 465, 639, 837, 1065, 1395, 1917, 2201, 3195, 4185, 5041, 6603, 9585, 11005, 15123, 19809, 25205, 33015, 45369, 59427, 75615, 99045, 136107, 156271, 226845, 297135, 468813, 680535, 781355, 1406439, 2344065, 4219317, 7032195, 21096585]

約数ペア:

[(1, 21096585), (3, 7032195), (5, 4219317), (9, 2344065), (15, 1406439), (27, 781355), (31, 680535), (45, 468813), (71, 297135), (93, 226845), (135, 156271), (155, 136107), (213, 99045), (279, 75615), (355, 59427), (465, 45369), (639, 33015), (837, 25205), (1065, 19809), (1395, 15123), (1917, 11005), (2201, 9585), (3195, 6603), (4185, 5041)]