7681821

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{181}}^1$

素因数の和:281

約数の個数: 32

約数和(自身を含む): 12300288

約数和(自身を除く): 4618467

約数列:

[1, 3, 7, 21, 43, 47, 129, 141, 181, 301, 329, 543, 903, 987, 1267, 2021, 3801, 6063, 7783, 8507, 14147, 23349, 25521, 42441, 54481, 59549, 163443, 178647, 365801, 1097403, 2560607, 7681821]

約数ペア:

[(1, 7681821), (3, 2560607), (7, 1097403), (21, 365801), (43, 178647), (47, 163443), (129, 59549), (141, 54481), (181, 42441), (301, 25521), (329, 23349), (543, 14147), (903, 8507), (987, 7783), (1267, 6063), (2021, 3801)]