21705400

素因数分解:

$2^3\times 5^2\times {\mathrm{41}}^1\times {\mathrm{2647}}^1$

素因数の和:2704

約数の個数: 48

約数和(自身を含む): 51715440

約数和(自身を除く): 30010040

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 50, 82, 100, 164, 200, 205, 328, 410, 820, 1025, 1640, 2050, 2647, 4100, 5294, 8200, 10588, 13235, 21176, 26470, 52940, 66175, 105880, 108527, 132350, 217054, 264700, 434108, 529400, 542635, 868216, 1085270, 2170540, 2713175, 4341080, 5426350, 10852700, 21705400]

約数ペア:

[(1, 21705400), (2, 10852700), (4, 5426350), (5, 4341080), (8, 2713175), (10, 2170540), (20, 1085270), (25, 868216), (40, 542635), (41, 529400), (50, 434108), (82, 264700), (100, 217054), (164, 132350), (200, 108527), (205, 105880), (328, 66175), (410, 52940), (820, 26470), (1025, 21176), (1640, 13235), (2050, 10588), (2647, 8200), (4100, 5294)]