21084440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{3119}}^1$

素因数の和:3156

約数の個数: 48

約数和(自身を含む): 51386400

約数和(自身を除く): 30301960

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 169, 260, 338, 520, 676, 845, 1352, 1690, 3119, 3380, 6238, 6760, 12476, 15595, 24952, 31190, 40547, 62380, 81094, 124760, 162188, 202735, 324376, 405470, 527111, 810940, 1054222, 1621880, 2108444, 2635555, 4216888, 5271110, 10542220, 21084440]

約数ペア:

[(1, 21084440), (2, 10542220), (4, 5271110), (5, 4216888), (8, 2635555), (10, 2108444), (13, 1621880), (20, 1054222), (26, 810940), (40, 527111), (52, 405470), (65, 324376), (104, 202735), (130, 162188), (169, 124760), (260, 81094), (338, 62380), (520, 40547), (676, 31190), (845, 24952), (1352, 15595), (1690, 12476), (3119, 6760), (3380, 6238)]