20913398

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{89}}^1\times {\mathrm{971}}^1$

素因数の和:1084

約数の個数: 24

約数和(自身を含む): 34904520

約数和(自身を除く): 13991122

約数列:

[1, 2, 11, 22, 89, 121, 178, 242, 971, 979, 1942, 1958, 10681, 10769, 21362, 21538, 86419, 117491, 172838, 234982, 950609, 1901218, 10456699, 20913398]

約数ペア:

[(1, 20913398), (2, 10456699), (11, 1901218), (22, 950609), (89, 234982), (121, 172838), (178, 117491), (242, 86419), (971, 21538), (979, 21362), (1942, 10769), (1958, 10681)]