21130480

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{389}}^1$

素因数の和:506

約数の個数: 80

約数和(自身を含む): 56871360

約数和(自身を除く): 35740880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 97, 112, 140, 194, 280, 388, 389, 485, 560, 679, 776, 778, 970, 1358, 1552, 1556, 1940, 1945, 2716, 2723, 3112, 3395, 3880, 3890, 5432, 5446, 6224, 6790, 7760, 7780, 10864, 10892, 13580, 13615, 15560, 21784, 27160, 27230, 31120, 37733, 43568, 54320, 54460, 75466, 108920, 150932, 188665, 217840, 264131, 301864, 377330, 528262, 603728, 754660, 1056524, 1320655, 1509320, 2113048, 2641310, 3018640, 4226096, 5282620, 10565240, 21130480]

約数ペア:

[(1, 21130480), (2, 10565240), (4, 5282620), (5, 4226096), (7, 3018640), (8, 2641310), (10, 2113048), (14, 1509320), (16, 1320655), (20, 1056524), (28, 754660), (35, 603728), (40, 528262), (56, 377330), (70, 301864), (80, 264131), (97, 217840), (112, 188665), (140, 150932), (194, 108920), (280, 75466), (388, 54460), (389, 54320), (485, 43568), (560, 37733), (679, 31120), (776, 27230), (778, 27160), (970, 21784), (1358, 15560), (1552, 13615), (1556, 13580), (1940, 10892), (1945, 10864), (2716, 7780), (2723, 7760), (3112, 6790), (3395, 6224), (3880, 5446), (3890, 5432)]