21972440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{809}}^1$

素因数の和:924

約数の個数: 64

約数和(自身を含む): 57153600

約数和(自身を除く): 35181160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 97, 140, 194, 280, 388, 485, 679, 776, 809, 970, 1358, 1618, 1940, 2716, 3236, 3395, 3880, 4045, 5432, 5663, 6472, 6790, 8090, 11326, 13580, 16180, 22652, 27160, 28315, 32360, 45304, 56630, 78473, 113260, 156946, 226520, 313892, 392365, 549311, 627784, 784730, 1098622, 1569460, 2197244, 2746555, 3138920, 4394488, 5493110, 10986220, 21972440]

約数ペア:

[(1, 21972440), (2, 10986220), (4, 5493110), (5, 4394488), (7, 3138920), (8, 2746555), (10, 2197244), (14, 1569460), (20, 1098622), (28, 784730), (35, 627784), (40, 549311), (56, 392365), (70, 313892), (97, 226520), (140, 156946), (194, 113260), (280, 78473), (388, 56630), (485, 45304), (679, 32360), (776, 28315), (809, 27160), (970, 22652), (1358, 16180), (1618, 13580), (1940, 11326), (2716, 8090), (3236, 6790), (3395, 6472), (3880, 5663), (4045, 5432)]