21790980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{121061}}^1$

素因数の和:121076

約数の個数: 36

約数和(自身を含む): 66099852

約数和(自身を除く): 44308872

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 121061, 242122, 363183, 484244, 605305, 726366, 1089549, 1210610, 1452732, 1815915, 2179098, 2421220, 3631830, 4358196, 5447745, 7263660, 10895490, 21790980]

約数ペア:

[(1, 21790980), (2, 10895490), (3, 7263660), (4, 5447745), (5, 4358196), (6, 3631830), (9, 2421220), (10, 2179098), (12, 1815915), (15, 1452732), (18, 1210610), (20, 1089549), (30, 726366), (36, 605305), (45, 484244), (60, 363183), (90, 242122), (180, 121061)]