21248289

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{907}}^1$

素因数の和:1069

約数の個数: 24

約数和(自身を含む): 32579040

約数和(自身を除く): 11330751

約数列:

[1, 3, 9, 19, 57, 137, 171, 411, 907, 1233, 2603, 2721, 7809, 8163, 17233, 23427, 51699, 124259, 155097, 372777, 1118331, 2360921, 7082763, 21248289]

約数ペア:

[(1, 21248289), (3, 7082763), (9, 2360921), (19, 1118331), (57, 372777), (137, 155097), (171, 124259), (411, 51699), (907, 23427), (1233, 17233), (2603, 8163), (2721, 7809)]