28439905

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{2221}}^1$

素因数の和:2436

約数の個数: 16

約数和(自身を含む): 36956304

約数和(自身を除く): 8516399

約数列:

[1, 5, 13, 65, 197, 985, 2221, 2561, 11105, 12805, 28873, 144365, 437537, 2187685, 5687981, 28439905]

約数ペア:

[(1, 28439905), (5, 5687981), (13, 2187685), (65, 437537), (197, 144365), (985, 28873), (2221, 12805), (2561, 11105)]