21493815

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{277}}^1\times {\mathrm{739}}^1$

素因数の和:1031

約数の個数: 32

約数和(自身を含む): 39498240

約数和(自身を除く): 18004425

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 277, 739, 831, 1385, 1939, 2217, 3695, 4155, 5173, 5817, 9695, 11085, 15519, 25865, 29085, 77595, 204703, 614109, 1023515, 1432921, 3070545, 4298763, 7164605, 21493815]

約数ペア:

[(1, 21493815), (3, 7164605), (5, 4298763), (7, 3070545), (15, 1432921), (21, 1023515), (35, 614109), (105, 204703), (277, 77595), (739, 29085), (831, 25865), (1385, 15519), (1939, 11085), (2217, 9695), (3695, 5817), (4155, 5173)]