20685915

素因数分解:

$3^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{2287}}^1$

素因数の和:2368

約数の個数: 32

約数和(自身を含む): 37340160

約数和(自身を除く): 16654245

約数列:

[1, 3, 5, 9, 15, 27, 45, 67, 135, 201, 335, 603, 1005, 1809, 2287, 3015, 6861, 9045, 11435, 20583, 34305, 61749, 102915, 153229, 308745, 459687, 766145, 1379061, 2298435, 4137183, 6895305, 20685915]

約数ペア:

[(1, 20685915), (3, 6895305), (5, 4137183), (9, 2298435), (15, 1379061), (27, 766145), (45, 459687), (67, 308745), (135, 153229), (201, 102915), (335, 61749), (603, 34305), (1005, 20583), (1809, 11435), (2287, 9045), (3015, 6861)]