20405780

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{60017}}^1$

素因数の和:60043

約数の個数: 24

約数和(自身を含む): 45373608

約数和(自身を除く): 24967828

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 60017, 120034, 240068, 300085, 600170, 1020289, 1200340, 2040578, 4081156, 5101445, 10202890, 20405780]

約数ペア:

[(1, 20405780), (2, 10202890), (4, 5101445), (5, 4081156), (10, 2040578), (17, 1200340), (20, 1020289), (34, 600170), (68, 300085), (85, 240068), (170, 120034), (340, 60017)]