20684871907

素因数分解:

$7^4\times {\mathrm{17}}^1\times {\mathrm{659}}^1\times {\mathrm{769}}^1$

素因数の和:1473

約数の個数: 40

約数和(自身を含む): 25622427600

約数和(自身を除く): 4937555693

約数列:

[1, 7, 17, 49, 119, 343, 659, 769, 833, 2401, 4613, 5383, 5831, 11203, 13073, 32291, 37681, 40817, 78421, 91511, 226037, 263767, 506771, 548947, 640577, 1582259, 1846369, 3547397, 3842629, 4484039, 8615107, 24831779, 26898403, 31388273, 60305749, 173822453, 422140243, 1216757171, 2954981701, 20684871907]

約数ペア:

[(1, 20684871907), (7, 2954981701), (17, 1216757171), (49, 422140243), (119, 173822453), (343, 60305749), (659, 31388273), (769, 26898403), (833, 24831779), (2401, 8615107), (4613, 4484039), (5383, 3842629), (5831, 3547397), (11203, 1846369), (13073, 1582259), (32291, 640577), (37681, 548947), (40817, 506771), (78421, 263767), (91511, 226037)]