400729

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{131}}^1$

素因数の和:180

約数の個数: 16

約数和(自身を含む): 506880

約数和(自身を除く): 106151

約数列:

[1, 7, 19, 23, 131, 133, 161, 437, 917, 2489, 3013, 3059, 17423, 21091, 57247, 400729]

約数ペア:

[(1, 400729), (7, 57247), (19, 21091), (23, 17423), (131, 3059), (133, 3013), (161, 2489), (437, 917)]