21954520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{881}}^1$

素因数の和:988

約数の個数: 64

約数和(自身を含む): 57153600

約数和(自身を除く): 35199080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 89, 140, 178, 280, 356, 445, 623, 712, 881, 890, 1246, 1762, 1780, 2492, 3115, 3524, 3560, 4405, 4984, 6167, 6230, 7048, 8810, 12334, 12460, 17620, 24668, 24920, 30835, 35240, 49336, 61670, 78409, 123340, 156818, 246680, 313636, 392045, 548863, 627272, 784090, 1097726, 1568180, 2195452, 2744315, 3136360, 4390904, 5488630, 10977260, 21954520]

約数ペア:

[(1, 21954520), (2, 10977260), (4, 5488630), (5, 4390904), (7, 3136360), (8, 2744315), (10, 2195452), (14, 1568180), (20, 1097726), (28, 784090), (35, 627272), (40, 548863), (56, 392045), (70, 313636), (89, 246680), (140, 156818), (178, 123340), (280, 78409), (356, 61670), (445, 49336), (623, 35240), (712, 30835), (881, 24920), (890, 24668), (1246, 17620), (1762, 12460), (1780, 12334), (2492, 8810), (3115, 7048), (3524, 6230), (3560, 6167), (4405, 4984)]