19967920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{197}}^1$

素因数の和:398

約数の個数: 80

約数和(自身を含む): 53621568

約数和(自身を除く): 33653648

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 181, 197, 280, 362, 394, 560, 724, 788, 905, 985, 1267, 1379, 1448, 1576, 1810, 1970, 2534, 2758, 2896, 3152, 3620, 3940, 5068, 5516, 6335, 6895, 7240, 7880, 10136, 11032, 12670, 13790, 14480, 15760, 20272, 22064, 25340, 27580, 35657, 50680, 55160, 71314, 101360, 110320, 142628, 178285, 249599, 285256, 356570, 499198, 570512, 713140, 998396, 1247995, 1426280, 1996792, 2495990, 2852560, 3993584, 4991980, 9983960, 19967920]

約数ペア:

[(1, 19967920), (2, 9983960), (4, 4991980), (5, 3993584), (7, 2852560), (8, 2495990), (10, 1996792), (14, 1426280), (16, 1247995), (20, 998396), (28, 713140), (35, 570512), (40, 499198), (56, 356570), (70, 285256), (80, 249599), (112, 178285), (140, 142628), (181, 110320), (197, 101360), (280, 71314), (362, 55160), (394, 50680), (560, 35657), (724, 27580), (788, 25340), (905, 22064), (985, 20272), (1267, 15760), (1379, 14480), (1448, 13790), (1576, 12670), (1810, 11032), (1970, 10136), (2534, 7880), (2758, 7240), (2896, 6895), (3152, 6335), (3620, 5516), (3940, 5068)]