20791980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{10501}}^1$

素因数の和:10527

約数の個数: 72

約数和(自身を含む): 68809104

約数和(自身を除く): 48017124

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980, 10501, 21002, 31503, 42004, 52505, 63006, 94509, 105010, 115511, 126012, 157515, 189018, 210020, 231022, 315030, 346533, 378036, 462044, 472545, 577555, 630060, 693066, 945090, 1039599, 1155110, 1386132, 1732665, 1890180, 2079198, 2310220, 3465330, 4158396, 5197995, 6930660, 10395990, 20791980]

約数ペア:

[(1, 20791980), (2, 10395990), (3, 6930660), (4, 5197995), (5, 4158396), (6, 3465330), (9, 2310220), (10, 2079198), (11, 1890180), (12, 1732665), (15, 1386132), (18, 1155110), (20, 1039599), (22, 945090), (30, 693066), (33, 630060), (36, 577555), (44, 472545), (45, 462044), (55, 378036), (60, 346533), (66, 315030), (90, 231022), (99, 210020), (110, 189018), (132, 157515), (165, 126012), (180, 115511), (198, 105010), (220, 94509), (330, 63006), (396, 52505), (495, 42004), (660, 31503), (990, 21002), (1980, 10501)]