21646520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{797}}^1$

素因数の和:912

約数の個数: 64

約数和(自身を含む): 56306880

約数和(自身を除く): 34660360

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, 797, 970, 1358, 1594, 1940, 2716, 3188, 3395, 3880, 3985, 5432, 5579, 6376, 6790, 7970, 11158, 13580, 15940, 22316, 27160, 27895, 31880, 44632, 55790, 77309, 111580, 154618, 223160, 309236, 386545, 541163, 618472, 773090, 1082326, 1546180, 2164652, 2705815, 3092360, 4329304, 5411630, 10823260, 21646520]

約数ペア:

[(1, 21646520), (2, 10823260), (4, 5411630), (5, 4329304), (7, 3092360), (8, 2705815), (10, 2164652), (14, 1546180), (20, 1082326), (28, 773090), (35, 618472), (40, 541163), (56, 386545), (70, 309236), (97, 223160), (140, 154618), (194, 111580), (280, 77309), (388, 55790), (485, 44632), (679, 31880), (776, 27895), (797, 27160), (970, 22316), (1358, 15940), (1594, 13580), (1940, 11158), (2716, 7970), (3188, 6790), (3395, 6376), (3880, 5579), (3985, 5432)]