20813751

素因数分解:

$3^2\times 7^1\times {\mathrm{67}}^1\times {\mathrm{4931}}^1$

素因数の和:5011

約数の個数: 24

約数和(自身を含む): 34879104

約数和(自身を除く): 14065353

約数列:

[1, 3, 7, 9, 21, 63, 67, 201, 469, 603, 1407, 4221, 4931, 14793, 34517, 44379, 103551, 310653, 330377, 991131, 2312639, 2973393, 6937917, 20813751]

約数ペア:

[(1, 20813751), (3, 6937917), (7, 2973393), (9, 2312639), (21, 991131), (63, 330377), (67, 310653), (201, 103551), (469, 44379), (603, 34517), (1407, 14793), (4221, 4931)]