686512

素因数分解:

$2^4\times {\mathrm{107}}^1\times {\mathrm{401}}^1$

素因数の和:516

約数の個数: 20

約数和(自身を含む): 1345896

約数和(自身を除く): 659384

約数列:

[1, 2, 4, 8, 16, 107, 214, 401, 428, 802, 856, 1604, 1712, 3208, 6416, 42907, 85814, 171628, 343256, 686512]

約数ペア:

[(1, 686512), (2, 343256), (4, 171628), (8, 85814), (16, 42907), (107, 6416), (214, 3208), (401, 1712), (428, 1604), (802, 856)]