19909975

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{593}}^1$

素因数の和:699

約数の個数: 24

約数和(自身を含む): 26516160

約数和(自身を除く): 6606185

約数列:

[1, 5, 17, 25, 79, 85, 395, 425, 593, 1343, 1975, 2965, 6715, 10081, 14825, 33575, 46847, 50405, 234235, 252025, 796399, 1171175, 3981995, 19909975]

約数ペア:

[(1, 19909975), (5, 3981995), (17, 1171175), (25, 796399), (79, 252025), (85, 234235), (395, 50405), (425, 46847), (593, 33575), (1343, 14825), (1975, 10081), (2965, 6715)]