20690215

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1229}}^1$

素因数の和:1291

約数の個数: 32

約数和(自身を含む): 31409280

約数和(自身を除く): 10719065

約数列:

[1, 5, 7, 13, 35, 37, 65, 91, 185, 259, 455, 481, 1229, 1295, 2405, 3367, 6145, 8603, 15977, 16835, 43015, 45473, 79885, 111839, 227365, 318311, 559195, 591149, 1591555, 2955745, 4138043, 20690215]

約数ペア:

[(1, 20690215), (5, 4138043), (7, 2955745), (13, 1591555), (35, 591149), (37, 559195), (65, 318311), (91, 227365), (185, 111839), (259, 79885), (455, 45473), (481, 43015), (1229, 16835), (1295, 15977), (2405, 8603), (3367, 6145)]