51720214

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1$

素因数の和:245

約数の個数: 64

約数和(自身を含む): 100638720

約数和(自身を除く): 48918506

約数列:

[1, 2, 7, 13, 14, 26, 31, 62, 89, 91, 103, 178, 182, 206, 217, 403, 434, 623, 721, 806, 1157, 1246, 1339, 1442, 2314, 2678, 2759, 2821, 3193, 5518, 5642, 6386, 8099, 9167, 9373, 16198, 18334, 18746, 19313, 22351, 35867, 38626, 41509, 44702, 64169, 71734, 83018, 119171, 128338, 238342, 251069, 284177, 290563, 502138, 568354, 581126, 834197, 1668394, 1989239, 3694301, 3978478, 7388602, 25860107, 51720214]

約数ペア:

[(1, 51720214), (2, 25860107), (7, 7388602), (13, 3978478), (14, 3694301), (26, 1989239), (31, 1668394), (62, 834197), (89, 581126), (91, 568354), (103, 502138), (178, 290563), (182, 284177), (206, 251069), (217, 238342), (403, 128338), (434, 119171), (623, 83018), (721, 71734), (806, 64169), (1157, 44702), (1246, 41509), (1339, 38626), (1442, 35867), (2314, 22351), (2678, 19313), (2759, 18746), (2821, 18334), (3193, 16198), (5518, 9373), (5642, 9167), (6386, 8099)]