12960400

素因数分解:

$2^4\times 5^2\times {\mathrm{32401}}^1$

素因数の和:32419

約数の個数: 30

約数和(自身を含む): 31138322

約数和(自身を除く): 18177922

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 32401, 64802, 129604, 162005, 259208, 324010, 518416, 648020, 810025, 1296040, 1620050, 2592080, 3240100, 6480200, 12960400]

約数ペア:

[(1, 12960400), (2, 6480200), (4, 3240100), (5, 2592080), (8, 1620050), (10, 1296040), (16, 810025), (20, 648020), (25, 518416), (40, 324010), (50, 259208), (80, 162005), (100, 129604), (200, 64802), (400, 32401)]