21154766

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{6991}}^1$

素因数の和:7099

約数の個数: 16

約数和(自身を含む): 33981120

約数和(自身を除く): 12826354

約数列:

[1, 2, 17, 34, 89, 178, 1513, 3026, 6991, 13982, 118847, 237694, 622199, 1244398, 10577383, 21154766]

約数ペア:

[(1, 21154766), (2, 10577383), (17, 1244398), (34, 622199), (89, 237694), (178, 118847), (1513, 13982), (3026, 6991)]