21270160

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2741}}^1$

素因数の和:2851

約数の個数: 40

約数和(自身を含む): 49981176

約数和(自身を除く): 28711016

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 2741, 3880, 5482, 7760, 10964, 13705, 21928, 27410, 43856, 54820, 109640, 219280, 265877, 531754, 1063508, 1329385, 2127016, 2658770, 4254032, 5317540, 10635080, 21270160]

約数ペア:

[(1, 21270160), (2, 10635080), (4, 5317540), (5, 4254032), (8, 2658770), (10, 2127016), (16, 1329385), (20, 1063508), (40, 531754), (80, 265877), (97, 219280), (194, 109640), (388, 54820), (485, 43856), (776, 27410), (970, 21928), (1552, 13705), (1940, 10964), (2741, 7760), (3880, 5482)]