20169580

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{499}}^1$

素因数の和:598

約数の個数: 48

約数和(自身を含む): 44352000

約数和(自身を除く): 24182420

約数列:

[1, 2, 4, 5, 10, 20, 43, 47, 86, 94, 172, 188, 215, 235, 430, 470, 499, 860, 940, 998, 1996, 2021, 2495, 4042, 4990, 8084, 9980, 10105, 20210, 21457, 23453, 40420, 42914, 46906, 85828, 93812, 107285, 117265, 214570, 234530, 429140, 469060, 1008479, 2016958, 4033916, 5042395, 10084790, 20169580]

約数ペア:

[(1, 20169580), (2, 10084790), (4, 5042395), (5, 4033916), (10, 2016958), (20, 1008479), (43, 469060), (47, 429140), (86, 234530), (94, 214570), (172, 117265), (188, 107285), (215, 93812), (235, 85828), (430, 46906), (470, 42914), (499, 40420), (860, 23453), (940, 21457), (998, 20210), (1996, 10105), (2021, 9980), (2495, 8084), (4042, 4990)]