51405320

素因数分解:

$2^3\times 5^1\times {\mathrm{997}}^1\times {\mathrm{1289}}^1$

素因数の和:2297

約数の個数: 32

約数和(自身を含む): 115867800

約数和(自身を除く): 64462480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 997, 1289, 1994, 2578, 3988, 4985, 5156, 6445, 7976, 9970, 10312, 12890, 19940, 25780, 39880, 51560, 1285133, 2570266, 5140532, 6425665, 10281064, 12851330, 25702660, 51405320]

約数ペア:

[(1, 51405320), (2, 25702660), (4, 12851330), (5, 10281064), (8, 6425665), (10, 5140532), (20, 2570266), (40, 1285133), (997, 51560), (1289, 39880), (1994, 25780), (2578, 19940), (3988, 12890), (4985, 10312), (5156, 9970), (6445, 7976)]