20428225

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{613}}^1$

素因数の和:697

約数の個数: 24

約数和(自身を含む): 26799872

約数和(自身を除く): 6371647

約数列:

[1, 5, 25, 31, 43, 155, 215, 613, 775, 1075, 1333, 3065, 6665, 15325, 19003, 26359, 33325, 95015, 131795, 475075, 658975, 817129, 4085645, 20428225]

約数ペア:

[(1, 20428225), (5, 4085645), (25, 817129), (31, 658975), (43, 475075), (155, 131795), (215, 95015), (613, 33325), (775, 26359), (1075, 19003), (1333, 15325), (3065, 6665)]