20005907905

素因数分解:

$5^1\times {\mathrm{47}}^2\times {\mathrm{83}}^1\times {\mathrm{139}}^1\times {\mathrm{157}}^1$

素因数の和:478

約数の個数: 48

約数和(自身を含む): 25162119360

約数和(自身を除く): 5156211455

約数列:

[1, 5, 47, 83, 139, 157, 235, 415, 695, 785, 2209, 3901, 6533, 7379, 11045, 11537, 13031, 19505, 21823, 32665, 36895, 57685, 65155, 109115, 183347, 307051, 346813, 542239, 612457, 916735, 1025681, 1535255, 1734065, 1811309, 2711195, 3062285, 5128405, 9056545, 25485233, 28785479, 48207007, 85131523, 127426165, 143927395, 241035035, 425657615, 4001181581, 20005907905]

約数ペア:

[(1, 20005907905), (5, 4001181581), (47, 425657615), (83, 241035035), (139, 143927395), (157, 127426165), (235, 85131523), (415, 48207007), (695, 28785479), (785, 25485233), (2209, 9056545), (3901, 5128405), (6533, 3062285), (7379, 2711195), (11045, 1811309), (11537, 1734065), (13031, 1535255), (19505, 1025681), (21823, 916735), (32665, 612457), (36895, 542239), (57685, 346813), (65155, 307051), (109115, 183347)]