20680275

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{3581}}^1$

素因数の和:3612

約数の個数: 48

約数和(自身を含む): 42640128

約数和(自身を除く): 21959853

約数列:

[1, 3, 5, 7, 11, 15, 21, 25, 33, 35, 55, 75, 77, 105, 165, 175, 231, 275, 385, 525, 825, 1155, 1925, 3581, 5775, 10743, 17905, 25067, 39391, 53715, 75201, 89525, 118173, 125335, 196955, 268575, 275737, 376005, 590865, 626675, 827211, 984775, 1378685, 1880025, 2954325, 4136055, 6893425, 20680275]

約数ペア:

[(1, 20680275), (3, 6893425), (5, 4136055), (7, 2954325), (11, 1880025), (15, 1378685), (21, 984775), (25, 827211), (33, 626675), (35, 590865), (55, 376005), (75, 275737), (77, 268575), (105, 196955), (165, 125335), (175, 118173), (231, 89525), (275, 75201), (385, 53715), (525, 39391), (825, 25067), (1155, 17905), (1925, 10743), (3581, 5775)]