18728091

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{283}}^1$

素因数の和:357

約数の個数: 40

約数和(自身を含む): 30240320

約数和(自身を除く): 11512229

約数列:

[1, 3, 9, 19, 27, 43, 57, 81, 129, 171, 283, 387, 513, 817, 849, 1161, 1539, 2451, 2547, 3483, 5377, 7353, 7641, 12169, 16131, 22059, 22923, 36507, 48393, 66177, 109521, 145179, 231211, 328563, 435537, 693633, 985689, 2080899, 6242697, 18728091]

約数ペア:

[(1, 18728091), (3, 6242697), (9, 2080899), (19, 985689), (27, 693633), (43, 435537), (57, 328563), (81, 231211), (129, 145179), (171, 109521), (283, 66177), (387, 48393), (513, 36507), (817, 22923), (849, 22059), (1161, 16131), (1539, 12169), (2451, 7641), (2547, 7353), (3483, 5377)]