21079996

素因数分解:

$2^2\times 7^2\times {\mathrm{131}}^1\times {\mathrm{821}}^1$

素因数の和:970

約数の個数: 36

約数和(自身を含む): 43293096

約数和(自身を除く): 22213100

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 131, 196, 262, 524, 821, 917, 1642, 1834, 3284, 3668, 5747, 6419, 11494, 12838, 22988, 25676, 40229, 80458, 107551, 160916, 215102, 430204, 752857, 1505714, 3011428, 5269999, 10539998, 21079996]

約数ペア:

[(1, 21079996), (2, 10539998), (4, 5269999), (7, 3011428), (14, 1505714), (28, 752857), (49, 430204), (98, 215102), (131, 160916), (196, 107551), (262, 80458), (524, 40229), (821, 25676), (917, 22988), (1642, 12838), (1834, 11494), (3284, 6419), (3668, 5747)]