20914088

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{499}}^1$

素因数の和:562

約数の個数: 48

約数和(自身を含む): 43920000

約数和(自身を除く): 23005912

約数列:

[1, 2, 4, 8, 13, 26, 31, 52, 62, 104, 124, 169, 248, 338, 403, 499, 676, 806, 998, 1352, 1612, 1996, 3224, 3992, 5239, 6487, 10478, 12974, 15469, 20956, 25948, 30938, 41912, 51896, 61876, 84331, 123752, 168662, 201097, 337324, 402194, 674648, 804388, 1608776, 2614261, 5228522, 10457044, 20914088]

約数ペア:

[(1, 20914088), (2, 10457044), (4, 5228522), (8, 2614261), (13, 1608776), (26, 804388), (31, 674648), (52, 402194), (62, 337324), (104, 201097), (124, 168662), (169, 123752), (248, 84331), (338, 61876), (403, 51896), (499, 41912), (676, 30938), (806, 25948), (998, 20956), (1352, 15469), (1612, 12974), (1996, 10478), (3224, 6487), (3992, 5239)]