821289

素因数分解:

$3^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{151}}^1$

素因数の和:205

約数の個数: 24

約数和(自身を含む): 1316928

約数和(自身を除く): 495639

約数列:

[1, 3, 7, 21, 37, 49, 111, 147, 151, 259, 453, 777, 1057, 1813, 3171, 5439, 5587, 7399, 16761, 22197, 39109, 117327, 273763, 821289]

約数ペア:

[(1, 821289), (3, 273763), (7, 117327), (21, 39109), (37, 22197), (49, 16761), (111, 7399), (147, 5587), (151, 5439), (259, 3171), (453, 1813), (777, 1057)]