21129485

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{73}}^2$

素因数の和:225

約数の個数: 24

約数和(自身を含む): 28138824

約数和(自身を除く): 7009339

約数列:

[1, 5, 13, 61, 65, 73, 305, 365, 793, 949, 3965, 4453, 4745, 5329, 22265, 26645, 57889, 69277, 289445, 325069, 346385, 1625345, 4225897, 21129485]

約数ペア:

[(1, 21129485), (5, 4225897), (13, 1625345), (61, 346385), (65, 325069), (73, 289445), (305, 69277), (365, 57889), (793, 26645), (949, 22265), (3965, 5329), (4453, 4745)]