18031325

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{509}}^1$

素因数の和:641

約数の個数: 24

約数和(自身を含む): 24347400

約数和(自身を除く): 6316075

約数列:

[1, 5, 13, 25, 65, 109, 325, 509, 545, 1417, 2545, 2725, 6617, 7085, 12725, 33085, 35425, 55481, 165425, 277405, 721253, 1387025, 3606265, 18031325]

約数ペア:

[(1, 18031325), (5, 3606265), (13, 1387025), (25, 721253), (65, 277405), (109, 165425), (325, 55481), (509, 35425), (545, 33085), (1417, 12725), (2545, 7085), (2725, 6617)]