20931449

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{223}}^1$

素因数の和:317

約数の個数: 32

約数和(自身を含む): 27869184

約数和(自身を除く): 6937735

約数列:

[1, 7, 11, 23, 53, 77, 161, 223, 253, 371, 583, 1219, 1561, 1771, 2453, 4081, 5129, 8533, 11819, 13409, 17171, 35903, 56419, 82733, 93863, 130009, 271837, 394933, 910063, 1902859, 2990207, 20931449]

約数ペア:

[(1, 20931449), (7, 2990207), (11, 1902859), (23, 910063), (53, 394933), (77, 271837), (161, 130009), (223, 93863), (253, 82733), (371, 56419), (583, 35903), (1219, 17171), (1561, 13409), (1771, 11819), (2453, 8533), (4081, 5129)]