21816249

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{509}}^1$

素因数の和:689

約数の個数: 32

約数和(自身を含む): 36099840

約数和(自身を除く): 14283591

約数列:

[1, 3, 7, 13, 21, 39, 91, 157, 273, 471, 509, 1099, 1527, 2041, 3297, 3563, 6123, 6617, 10689, 14287, 19851, 42861, 46319, 79913, 138957, 239739, 559391, 1038869, 1678173, 3116607, 7272083, 21816249]

約数ペア:

[(1, 21816249), (3, 7272083), (7, 3116607), (13, 1678173), (21, 1038869), (39, 559391), (91, 239739), (157, 138957), (273, 79913), (471, 46319), (509, 42861), (1099, 19851), (1527, 14287), (2041, 10689), (3297, 6617), (3563, 6123)]