644633540

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{1895981}}^1$

素因数の和:1896007

約数の個数: 24

約数和(自身を含む): 1433362392

約数和(自身を除く): 788728852

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 1895981, 3791962, 7583924, 9479905, 18959810, 32231677, 37919620, 64463354, 128926708, 161158385, 322316770, 644633540]

約数ペア:

[(1, 644633540), (2, 322316770), (4, 161158385), (5, 128926708), (10, 64463354), (17, 37919620), (20, 32231677), (34, 18959810), (68, 9479905), (85, 7583924), (170, 3791962), (340, 1895981)]