12720025

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{439}}^1$

素因数の和:529

約数の個数: 24

約数和(自身を含む): 16913600

約数和(自身を除く): 4193575

約数列:

[1, 5, 19, 25, 61, 95, 305, 439, 475, 1159, 1525, 2195, 5795, 8341, 10975, 26779, 28975, 41705, 133895, 208525, 508801, 669475, 2544005, 12720025]

約数ペア:

[(1, 12720025), (5, 2544005), (19, 669475), (25, 508801), (61, 208525), (95, 133895), (305, 41705), (439, 28975), (475, 26779), (1159, 10975), (1525, 8341), (2195, 5795)]