21808980

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{40387}}^1$

素因数の和:40405

約数の個数: 48

約数和(自身を含む): 67851840

約数和(自身を除く): 46042860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 90, 108, 135, 180, 270, 540, 40387, 80774, 121161, 161548, 201935, 242322, 363483, 403870, 484644, 605805, 726966, 807740, 1090449, 1211610, 1453932, 1817415, 2180898, 2423220, 3634830, 4361796, 5452245, 7269660, 10904490, 21808980]

約数ペア:

[(1, 21808980), (2, 10904490), (3, 7269660), (4, 5452245), (5, 4361796), (6, 3634830), (9, 2423220), (10, 2180898), (12, 1817415), (15, 1453932), (18, 1211610), (20, 1090449), (27, 807740), (30, 726966), (36, 605805), (45, 484644), (54, 403870), (60, 363483), (90, 242322), (108, 201935), (135, 161548), (180, 121161), (270, 80774), (540, 40387)]