20399660

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{59999}}^1$

素因数の和:60025

約数の個数: 24

約数和(自身を含む): 45360000

約数和(自身を除く): 24960340

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 59999, 119998, 239996, 299995, 599990, 1019983, 1199980, 2039966, 4079932, 5099915, 10199830, 20399660]

約数ペア:

[(1, 20399660), (2, 10199830), (4, 5099915), (5, 4079932), (10, 2039966), (17, 1199980), (20, 1019983), (34, 599990), (68, 299995), (85, 239996), (170, 119998), (340, 59999)]