21161957880

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{389}}^1\times {\mathrm{64763}}^1$

素因数の和:65173

約数の個数: 128

約数和(自身を含む): 72742924800

約数和(自身を除く): 51580966920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 389, 420, 778, 840, 1167, 1556, 1945, 2334, 2723, 3112, 3890, 4668, 5446, 5835, 7780, 8169, 9336, 10892, 11670, 13615, 15560, 16338, 21784, 23340, 27230, 32676, 40845, 46680, 54460, 64763, 65352, 81690, 108920, 129526, 163380, 194289, 259052, 323815, 326760, 388578, 453341, 518104, 647630, 777156, 906682, 971445, 1295260, 1360023, 1554312, 1813364, 1942890, 2266705, 2590520, 2720046, 3626728, 3885780, 4533410, 5440092, 6800115, 7771560, 9066820, 10880184, 13600230, 18133640, 25192807, 27200460, 50385614, 54400920, 75578421, 100771228, 125964035, 151156842, 176349649, 201542456, 251928070, 302313684, 352699298, 377892105, 503856140, 529048947, 604627368, 705398596, 755784210, 881748245, 1007712280, 1058097894, 1410797192, 1511568420, 1763496490, 2116195788, 2645244735, 3023136840, 3526992980, 4232391576, 5290489470, 7053985960, 10580978940, 21161957880]

約数ペア:

[(1, 21161957880), (2, 10580978940), (3, 7053985960), (4, 5290489470), (5, 4232391576), (6, 3526992980), (7, 3023136840), (8, 2645244735), (10, 2116195788), (12, 1763496490), (14, 1511568420), (15, 1410797192), (20, 1058097894), (21, 1007712280), (24, 881748245), (28, 755784210), (30, 705398596), (35, 604627368), (40, 529048947), (42, 503856140), (56, 377892105), (60, 352699298), (70, 302313684), (84, 251928070), (105, 201542456), (120, 176349649), (140, 151156842), (168, 125964035), (210, 100771228), (280, 75578421), (389, 54400920), (420, 50385614), (778, 27200460), (840, 25192807), (1167, 18133640), (1556, 13600230), (1945, 10880184), (2334, 9066820), (2723, 7771560), (3112, 6800115), (3890, 5440092), (4668, 4533410), (5446, 3885780), (5835, 3626728), (7780, 2720046), (8169, 2590520), (9336, 2266705), (10892, 1942890), (11670, 1813364), (13615, 1554312), (15560, 1360023), (16338, 1295260), (21784, 971445), (23340, 906682), (27230, 777156), (32676, 647630), (40845, 518104), (46680, 453341), (54460, 388578), (64763, 326760), (65352, 323815), (81690, 259052), (108920, 194289), (129526, 163380)]