21284788

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{40009}}^1$

素因数の和:40039

約数の個数: 24

約数和(自身を含む): 44811200

約数和(自身を除く): 23526412

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 266, 532, 40009, 80018, 160036, 280063, 560126, 760171, 1120252, 1520342, 3040684, 5321197, 10642394, 21284788]

約数ペア:

[(1, 21284788), (2, 10642394), (4, 5321197), (7, 3040684), (14, 1520342), (19, 1120252), (28, 760171), (38, 560126), (76, 280063), (133, 160036), (266, 80018), (532, 40009)]