19978666

素因数分解:

$2^1\times {\mathrm{47}}^1\times {\mathrm{257}}^1\times {\mathrm{827}}^1$

素因数の和:1133

約数の個数: 16

約数和(自身を含む): 30761856

約数和(自身を除く): 10783190

約数列:

[1, 2, 47, 94, 257, 514, 827, 1654, 12079, 24158, 38869, 77738, 212539, 425078, 9989333, 19978666]

約数ペア:

[(1, 19978666), (2, 9989333), (47, 425078), (94, 212539), (257, 77738), (514, 38869), (827, 24158), (1654, 12079)]