18847975

素因数分解:

$5^2\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{197}}^1$

素因数の和:339

約数の個数: 24

約数和(自身を含む): 24306480

約数和(自身を除く): 5458505

約数列:

[1, 5, 25, 43, 89, 197, 215, 445, 985, 1075, 2225, 3827, 4925, 8471, 17533, 19135, 42355, 87665, 95675, 211775, 438325, 753919, 3769595, 18847975]

約数ペア:

[(1, 18847975), (5, 3769595), (25, 753919), (43, 438325), (89, 211775), (197, 95675), (215, 87665), (445, 42355), (985, 19135), (1075, 17533), (2225, 8471), (3827, 4925)]