20356581

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{313}}^1$

素因数の和:505

約数の個数: 32

約数和(自身を含む): 32957440

約数和(自身を除く): 12600859

約数列:

[1, 3, 7, 19, 21, 57, 133, 163, 313, 399, 489, 939, 1141, 2191, 3097, 3423, 5947, 6573, 9291, 17841, 21679, 41629, 51019, 65037, 124887, 153057, 357133, 969361, 1071399, 2908083, 6785527, 20356581]

約数ペア:

[(1, 20356581), (3, 6785527), (7, 2908083), (19, 1071399), (21, 969361), (57, 357133), (133, 153057), (163, 124887), (313, 65037), (399, 51019), (489, 41629), (939, 21679), (1141, 17841), (2191, 9291), (3097, 6573), (3423, 5947)]