21025825

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{281}}^1$

素因数の和:405

約数の個数: 24

約数和(自身を含む): 27170136

約数和(自身を除く): 6144311

約数列:

[1, 5, 25, 41, 73, 205, 281, 365, 1025, 1405, 1825, 2993, 7025, 11521, 14965, 20513, 57605, 74825, 102565, 288025, 512825, 841033, 4205165, 21025825]

約数ペア:

[(1, 21025825), (5, 4205165), (25, 841033), (41, 512825), (73, 288025), (205, 102565), (281, 74825), (365, 57605), (1025, 20513), (1405, 14965), (1825, 11521), (2993, 7025)]