20816820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1061}}^1$

素因数の和:1185

約数の個数: 72

約数和(自身を含む): 63783720

約数和(自身を除く): 42966900

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 109, 180, 218, 327, 436, 545, 654, 981, 1061, 1090, 1308, 1635, 1962, 2122, 2180, 3183, 3270, 3924, 4244, 4905, 5305, 6366, 6540, 9549, 9810, 10610, 12732, 15915, 19098, 19620, 21220, 31830, 38196, 47745, 63660, 95490, 115649, 190980, 231298, 346947, 462596, 578245, 693894, 1040841, 1156490, 1387788, 1734735, 2081682, 2312980, 3469470, 4163364, 5204205, 6938940, 10408410, 20816820]

約数ペア:

[(1, 20816820), (2, 10408410), (3, 6938940), (4, 5204205), (5, 4163364), (6, 3469470), (9, 2312980), (10, 2081682), (12, 1734735), (15, 1387788), (18, 1156490), (20, 1040841), (30, 693894), (36, 578245), (45, 462596), (60, 346947), (90, 231298), (109, 190980), (180, 115649), (218, 95490), (327, 63660), (436, 47745), (545, 38196), (654, 31830), (981, 21220), (1061, 19620), (1090, 19098), (1308, 15915), (1635, 12732), (1962, 10610), (2122, 9810), (2180, 9549), (3183, 6540), (3270, 6366), (3924, 5305), (4244, 4905)]