19653921

素因数分解:

$3^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{2039}}^1$

素因数の和:2075

約数の個数: 40

約数和(自身を含む): 35544960

約数和(自身を除く): 15891039

約数列:

[1, 3, 7, 9, 17, 21, 27, 51, 63, 81, 119, 153, 189, 357, 459, 567, 1071, 1377, 2039, 3213, 6117, 9639, 14273, 18351, 34663, 42819, 55053, 103989, 128457, 165159, 242641, 311967, 385371, 727923, 935901, 1156113, 2183769, 2807703, 6551307, 19653921]

約数ペア:

[(1, 19653921), (3, 6551307), (7, 2807703), (9, 2183769), (17, 1156113), (21, 935901), (27, 727923), (51, 385371), (63, 311967), (81, 242641), (119, 165159), (153, 128457), (189, 103989), (357, 55053), (459, 42819), (567, 34663), (1071, 18351), (1377, 14273), (2039, 9639), (3213, 6117)]