21516400

素因数分解:

$2^4\times 5^2\times {\mathrm{53791}}^1$

素因数の和:53809

約数の個数: 30

約数和(自身を含む): 51694112

約数和(自身を除く): 30177712

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 53791, 107582, 215164, 268955, 430328, 537910, 860656, 1075820, 1344775, 2151640, 2689550, 4303280, 5379100, 10758200, 21516400]

約数ペア:

[(1, 21516400), (2, 10758200), (4, 5379100), (5, 4303280), (8, 2689550), (10, 2151640), (16, 1344775), (20, 1075820), (25, 860656), (40, 537910), (50, 430328), (80, 268955), (100, 215164), (200, 107582), (400, 53791)]