20572960

素因数分解:

$2^5\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1811}}^1$

素因数の和:1897

約数の個数: 48

約数和(自身を含む): 49315392

約数和(自身を除く): 28742432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 71, 80, 142, 160, 284, 355, 568, 710, 1136, 1420, 1811, 2272, 2840, 3622, 5680, 7244, 9055, 11360, 14488, 18110, 28976, 36220, 57952, 72440, 128581, 144880, 257162, 289760, 514324, 642905, 1028648, 1285810, 2057296, 2571620, 4114592, 5143240, 10286480, 20572960]

約数ペア:

[(1, 20572960), (2, 10286480), (4, 5143240), (5, 4114592), (8, 2571620), (10, 2057296), (16, 1285810), (20, 1028648), (32, 642905), (40, 514324), (71, 289760), (80, 257162), (142, 144880), (160, 128581), (284, 72440), (355, 57952), (568, 36220), (710, 28976), (1136, 18110), (1420, 14488), (1811, 11360), (2272, 9055), (2840, 7244), (3622, 5680)]