21728360

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{13249}}^1$

素因数の和:13301

約数の個数: 32

約数和(自身を含む): 50085000

約数和(自身を除く): 28356640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 13249, 26498, 52996, 66245, 105992, 132490, 264980, 529960, 543209, 1086418, 2172836, 2716045, 4345672, 5432090, 10864180, 21728360]

約数ペア:

[(1, 21728360), (2, 10864180), (4, 5432090), (5, 4345672), (8, 2716045), (10, 2172836), (20, 1086418), (40, 543209), (41, 529960), (82, 264980), (164, 132490), (205, 105992), (328, 66245), (410, 52996), (820, 26498), (1640, 13249)]