28091215

素因数分解:

$5^1\times {\mathrm{19}}^2\times {\mathrm{79}}^1\times {\mathrm{197}}^1$

素因数の和:319

約数の個数: 24

約数和(自身を含む): 36210240

約数和(自身を除く): 8119025

約数列:

[1, 5, 19, 79, 95, 197, 361, 395, 985, 1501, 1805, 3743, 7505, 15563, 18715, 28519, 71117, 77815, 142595, 295697, 355585, 1478485, 5618243, 28091215]

約数ペア:

[(1, 28091215), (5, 5618243), (19, 1478485), (79, 355585), (95, 295697), (197, 142595), (361, 77815), (395, 71117), (985, 28519), (1501, 18715), (1805, 15563), (3743, 7505)]