20988387

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19597}}^1$

素因数の和:19627

約数の個数: 24

約数和(自身を含む): 36687456

約数和(自身を除く): 15699069

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 19597, 58791, 137179, 176373, 333149, 411537, 999447, 1234611, 2332043, 2998341, 6996129, 20988387]

約数ペア:

[(1, 20988387), (3, 6996129), (7, 2998341), (9, 2332043), (17, 1234611), (21, 999447), (51, 411537), (63, 333149), (119, 176373), (153, 137179), (357, 58791), (1071, 19597)]