20138320

素因数分解:

$2^4\times 5^1\times {\mathrm{139}}^1\times {\mathrm{1811}}^1$

素因数の和:1963

約数の個数: 40

約数和(自身を含む): 47184480

約数和(自身を除く): 27046160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 139, 278, 556, 695, 1112, 1390, 1811, 2224, 2780, 3622, 5560, 7244, 9055, 11120, 14488, 18110, 28976, 36220, 72440, 144880, 251729, 503458, 1006916, 1258645, 2013832, 2517290, 4027664, 5034580, 10069160, 20138320]

約数ペア:

[(1, 20138320), (2, 10069160), (4, 5034580), (5, 4027664), (8, 2517290), (10, 2013832), (16, 1258645), (20, 1006916), (40, 503458), (80, 251729), (139, 144880), (278, 72440), (556, 36220), (695, 28976), (1112, 18110), (1390, 14488), (1811, 11120), (2224, 9055), (2780, 7244), (3622, 5560)]