20178575

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{601}}^1$

素因数の和:707

約数の個数: 24

約数和(自身を含む): 26873280

約数和(自身を除く): 6694705

約数列:

[1, 5, 17, 25, 79, 85, 395, 425, 601, 1343, 1975, 3005, 6715, 10217, 15025, 33575, 47479, 51085, 237395, 255425, 807143, 1186975, 4035715, 20178575]

約数ペア:

[(1, 20178575), (5, 4035715), (17, 1186975), (25, 807143), (79, 255425), (85, 237395), (395, 51085), (425, 47479), (601, 33575), (1343, 15025), (1975, 10217), (3005, 6715)]