21288501

素因数分解:

$3^5\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{293}}^1$

素因数の和:344

約数の個数: 48

約数和(自身を含む): 35957376

約数和(自身を除く): 14668875

約数列:

[1, 3, 9, 13, 23, 27, 39, 69, 81, 117, 207, 243, 293, 299, 351, 621, 879, 897, 1053, 1863, 2637, 2691, 3159, 3809, 5589, 6739, 7911, 8073, 11427, 20217, 23733, 24219, 34281, 60651, 71199, 72657, 87607, 102843, 181953, 262821, 308529, 545859, 788463, 925587, 1637577, 2365389, 7096167, 21288501]

約数ペア:

[(1, 21288501), (3, 7096167), (9, 2365389), (13, 1637577), (23, 925587), (27, 788463), (39, 545859), (69, 308529), (81, 262821), (117, 181953), (207, 102843), (243, 87607), (293, 72657), (299, 71199), (351, 60651), (621, 34281), (879, 24219), (897, 23733), (1053, 20217), (1863, 11427), (2637, 8073), (2691, 7911), (3159, 6739), (3809, 5589)]