21095980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{62047}}^1$

素因数の和:62073

約数の個数: 24

約数和(自身を含む): 46908288

約数和(自身を除く): 25812308

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 62047, 124094, 248188, 310235, 620470, 1054799, 1240940, 2109598, 4219196, 5273995, 10547990, 21095980]

約数ペア:

[(1, 21095980), (2, 10547990), (4, 5273995), (5, 4219196), (10, 2109598), (17, 1240940), (20, 1054799), (34, 620470), (68, 310235), (85, 248188), (170, 124094), (340, 62047)]