18666557

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{509}}^1$

素因数の和:573

約数の個数: 24

約数和(自身を含む): 23892480

約数和(自身を除く): 5225923

約数列:

[1, 7, 13, 31, 91, 169, 217, 403, 509, 1183, 2821, 3563, 5239, 6617, 15779, 36673, 46319, 86021, 110453, 205127, 602147, 1435889, 2666651, 18666557]

約数ペア:

[(1, 18666557), (7, 2666651), (13, 1435889), (31, 602147), (91, 205127), (169, 110453), (217, 86021), (403, 46319), (509, 36673), (1183, 15779), (2821, 6617), (3563, 5239)]