21289268

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{409}}^1$

素因数の和:457

約数の個数: 72

約数和(自身を含む): 50420160

約数和(自身を除く): 29130892

約数列:

[1, 2, 4, 7, 11, 13, 14, 22, 26, 28, 44, 52, 77, 91, 143, 154, 169, 182, 286, 308, 338, 364, 409, 572, 676, 818, 1001, 1183, 1636, 1859, 2002, 2366, 2863, 3718, 4004, 4499, 4732, 5317, 5726, 7436, 8998, 10634, 11452, 13013, 17996, 21268, 26026, 31493, 37219, 52052, 58487, 62986, 69121, 74438, 116974, 125972, 138242, 148876, 233948, 276484, 409409, 483847, 760331, 818818, 967694, 1520662, 1637636, 1935388, 3041324, 5322317, 10644634, 21289268]

約数ペア:

[(1, 21289268), (2, 10644634), (4, 5322317), (7, 3041324), (11, 1935388), (13, 1637636), (14, 1520662), (22, 967694), (26, 818818), (28, 760331), (44, 483847), (52, 409409), (77, 276484), (91, 233948), (143, 148876), (154, 138242), (169, 125972), (182, 116974), (286, 74438), (308, 69121), (338, 62986), (364, 58487), (409, 52052), (572, 37219), (676, 31493), (818, 26026), (1001, 21268), (1183, 17996), (1636, 13013), (1859, 11452), (2002, 10634), (2366, 8998), (2863, 7436), (3718, 5726), (4004, 5317), (4499, 4732)]