81207775

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{103}}^1$

素因数の和:232

約数の個数: 48

約数和(自身を含む): 115135488

約数和(自身を除く): 33927713

約数列:

[1, 5, 11, 25, 47, 55, 61, 103, 235, 275, 305, 515, 517, 671, 1133, 1175, 1525, 2575, 2585, 2867, 3355, 4841, 5665, 6283, 12925, 14335, 16775, 24205, 28325, 31415, 31537, 53251, 69113, 71675, 121025, 157075, 157685, 266255, 295301, 345565, 788425, 1331275, 1476505, 1727825, 3248311, 7382525, 16241555, 81207775]

約数ペア:

[(1, 81207775), (5, 16241555), (11, 7382525), (25, 3248311), (47, 1727825), (55, 1476505), (61, 1331275), (103, 788425), (235, 345565), (275, 295301), (305, 266255), (515, 157685), (517, 157075), (671, 121025), (1133, 71675), (1175, 69113), (1525, 53251), (2575, 31537), (2585, 31415), (2867, 28325), (3355, 24205), (4841, 16775), (5665, 14335), (6283, 12925)]