21335216

素因数分解:

$2^4\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2683}}^1$

素因数の和:2769

約数の個数: 40

約数和(自身を含む): 47925504

約数和(自身を除く): 26590288

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 71, 112, 142, 284, 497, 568, 994, 1136, 1988, 2683, 3976, 5366, 7952, 10732, 18781, 21464, 37562, 42928, 75124, 150248, 190493, 300496, 380986, 761972, 1333451, 1523944, 2666902, 3047888, 5333804, 10667608, 21335216]

約数ペア:

[(1, 21335216), (2, 10667608), (4, 5333804), (7, 3047888), (8, 2666902), (14, 1523944), (16, 1333451), (28, 761972), (56, 380986), (71, 300496), (112, 190493), (142, 150248), (284, 75124), (497, 42928), (568, 37562), (994, 21464), (1136, 18781), (1988, 10732), (2683, 7952), (3976, 5366)]