21971521

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{223}}^1$

素因数の和:313

約数の個数: 24

約数和(自身を含む): 26562816

約数和(自身を除く): 4591295

約数列:

[1, 11, 13, 53, 143, 169, 223, 583, 689, 1859, 2453, 2899, 7579, 8957, 11819, 31889, 37687, 98527, 130009, 153647, 414557, 1690117, 1997411, 21971521]

約数ペア:

[(1, 21971521), (11, 1997411), (13, 1690117), (53, 414557), (143, 153647), (169, 130009), (223, 98527), (583, 37687), (689, 31889), (1859, 11819), (2453, 8957), (2899, 7579)]