20216456

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{787}}^1$

素因数の和:838

約数の個数: 48

約数和(自身を含む): 43261200

約数和(自身を除く): 23044744

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 52, 76, 104, 152, 169, 247, 338, 494, 676, 787, 988, 1352, 1574, 1976, 3148, 3211, 6296, 6422, 10231, 12844, 14953, 20462, 25688, 29906, 40924, 59812, 81848, 119624, 133003, 194389, 266006, 388778, 532012, 777556, 1064024, 1555112, 2527057, 5054114, 10108228, 20216456]

約数ペア:

[(1, 20216456), (2, 10108228), (4, 5054114), (8, 2527057), (13, 1555112), (19, 1064024), (26, 777556), (38, 532012), (52, 388778), (76, 266006), (104, 194389), (152, 133003), (169, 119624), (247, 81848), (338, 59812), (494, 40924), (676, 29906), (787, 25688), (988, 20462), (1352, 14953), (1574, 12844), (1976, 10231), (3148, 6422), (3211, 6296)]