21312004

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{571}}^1$

素因数の和:656

約数の個数: 48

約数和(自身を含む): 45101056

約数和(自身を除く): 23789052

約数列:

[1, 2, 4, 7, 14, 28, 31, 43, 62, 86, 124, 172, 217, 301, 434, 571, 602, 868, 1142, 1204, 1333, 2284, 2666, 3997, 5332, 7994, 9331, 15988, 17701, 18662, 24553, 35402, 37324, 49106, 70804, 98212, 123907, 171871, 247814, 343742, 495628, 687484, 761143, 1522286, 3044572, 5328001, 10656002, 21312004]

約数ペア:

[(1, 21312004), (2, 10656002), (4, 5328001), (7, 3044572), (14, 1522286), (28, 761143), (31, 687484), (43, 495628), (62, 343742), (86, 247814), (124, 171871), (172, 123907), (217, 98212), (301, 70804), (434, 49106), (571, 37324), (602, 35402), (868, 24553), (1142, 18662), (1204, 17701), (1333, 15988), (2284, 9331), (2666, 7994), (3997, 5332)]