21257415

素因数分解:

$3^2\times 5^1\times {\mathrm{227}}^1\times {\mathrm{2081}}^1$

素因数の和:2319

約数の個数: 24

約数和(自身を含む): 37026288

約数和(自身を除く): 15768873

約数列:

[1, 3, 5, 9, 15, 45, 227, 681, 1135, 2043, 2081, 3405, 6243, 10215, 10405, 18729, 31215, 93645, 472387, 1417161, 2361935, 4251483, 7085805, 21257415]

約数ペア:

[(1, 21257415), (3, 7085805), (5, 4251483), (9, 2361935), (15, 1417161), (45, 472387), (227, 93645), (681, 31215), (1135, 18729), (2043, 10405), (2081, 10215), (3405, 6243)]