21386729

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{1181}}^1$

素因数の和:1400

約数の個数: 16

約数和(自身を含む): 26476800

約数和(自身を除く): 5090071

約数列:

[1, 7, 13, 91, 199, 1181, 1393, 2587, 8267, 15353, 18109, 107471, 235019, 1645133, 3055247, 21386729]

約数ペア:

[(1, 21386729), (7, 3055247), (13, 1645133), (91, 235019), (199, 107471), (1181, 18109), (1393, 15353), (2587, 8267)]