20905580

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61487}}^1$

素因数の和:61513

約数の個数: 24

約数和(自身を含む): 46484928

約数和(自身を除く): 25579348

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 61487, 122974, 245948, 307435, 614870, 1045279, 1229740, 2090558, 4181116, 5226395, 10452790, 20905580]

約数ペア:

[(1, 20905580), (2, 10452790), (4, 5226395), (5, 4181116), (10, 2090558), (17, 1229740), (20, 1045279), (34, 614870), (68, 307435), (85, 245948), (170, 122974), (340, 61487)]