19701980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{57947}}^1$

素因数の和:57973

約数の個数: 24

約数和(自身を含む): 43808688

約数和(自身を除く): 24106708

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 57947, 115894, 231788, 289735, 579470, 985099, 1158940, 1970198, 3940396, 4925495, 9850990, 19701980]

約数ペア:

[(1, 19701980), (2, 9850990), (4, 4925495), (5, 3940396), (10, 1970198), (17, 1158940), (20, 985099), (34, 579470), (68, 289735), (85, 231788), (170, 115894), (340, 57947)]