21397325

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{421}}^1$

素因数の和:557

約数の個数: 24

約数和(自身を含む): 28257120

約数和(自身を除く): 6859795

約数列:

[1, 5, 19, 25, 95, 107, 421, 475, 535, 2033, 2105, 2675, 7999, 10165, 10525, 39995, 45047, 50825, 199975, 225235, 855893, 1126175, 4279465, 21397325]

約数ペア:

[(1, 21397325), (5, 4279465), (19, 1126175), (25, 855893), (95, 225235), (107, 199975), (421, 50825), (475, 45047), (535, 39995), (2033, 10525), (2105, 10165), (2675, 7999)]