18655273

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{389}}^1$

素因数の和:457

約数の個数: 32

約数和(自身を含む): 25159680

約数和(自身を除く): 6504407

約数列:

[1, 7, 13, 17, 31, 91, 119, 217, 221, 389, 403, 527, 1547, 2723, 2821, 3689, 5057, 6613, 6851, 12059, 35399, 46291, 47957, 84413, 85969, 156767, 205003, 601783, 1097369, 1435021, 2665039, 18655273]

約数ペア:

[(1, 18655273), (7, 2665039), (13, 1435021), (17, 1097369), (31, 601783), (91, 205003), (119, 156767), (217, 85969), (221, 84413), (389, 47957), (403, 46291), (527, 35399), (1547, 12059), (2723, 6851), (2821, 6613), (3689, 5057)]