18729921

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{28771}}^1$

素因数の和:28812

約数の個数: 16

約数和(自身を含む): 29462528

約数和(自身を除く): 10732607

約数列:

[1, 3, 7, 21, 31, 93, 217, 651, 28771, 86313, 201397, 604191, 891901, 2675703, 6243307, 18729921]

約数ペア:

[(1, 18729921), (3, 6243307), (7, 2675703), (21, 891901), (31, 604191), (93, 201397), (217, 86313), (651, 28771)]