66798221

素因数分解:

$7^4\times {\mathrm{43}}^1\times {\mathrm{647}}^1$

素因数の和:718

約数の個数: 20

約数和(自身を含む): 79862112

約数和(自身を除く): 13063891

約数列:

[1, 7, 43, 49, 301, 343, 647, 2107, 2401, 4529, 14749, 27821, 31703, 103243, 194747, 221921, 1363229, 1553447, 9542603, 66798221]

約数ペア:

[(1, 66798221), (7, 9542603), (43, 1553447), (49, 1363229), (301, 221921), (343, 194747), (647, 103243), (2107, 31703), (2401, 27821), (4529, 14749)]