640542925

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{227}}^1\times {\mathrm{331}}^1$

素因数の和:610

約数の個数: 48

約数和(自身を含む): 901085184

約数和(自身を除く): 260542259

約数列:

[1, 5, 11, 25, 31, 55, 155, 227, 275, 331, 341, 775, 1135, 1655, 1705, 2497, 3641, 5675, 7037, 8275, 8525, 10261, 12485, 18205, 35185, 51305, 62425, 75137, 77407, 91025, 112871, 175925, 256525, 375685, 387035, 564355, 826507, 1878425, 1935175, 2329247, 2821775, 4132535, 11646235, 20662675, 25621717, 58231175, 128108585, 640542925]

約数ペア:

[(1, 640542925), (5, 128108585), (11, 58231175), (25, 25621717), (31, 20662675), (55, 11646235), (155, 4132535), (227, 2821775), (275, 2329247), (331, 1935175), (341, 1878425), (775, 826507), (1135, 564355), (1655, 387035), (1705, 375685), (2497, 256525), (3641, 175925), (5675, 112871), (7037, 91025), (8275, 77407), (8525, 75137), (10261, 62425), (12485, 51305), (18205, 35185)]