20499025

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{347}}^1$

素因数の和:513

約数の個数: 24

約数和(自身を含む): 27185760

約数和(自身を除く): 6686735

約数列:

[1, 5, 17, 25, 85, 139, 347, 425, 695, 1735, 2363, 3475, 5899, 8675, 11815, 29495, 48233, 59075, 147475, 241165, 819961, 1205825, 4099805, 20499025]

約数ペア:

[(1, 20499025), (5, 4099805), (17, 1205825), (25, 819961), (85, 241165), (139, 147475), (347, 59075), (425, 48233), (695, 29495), (1735, 11815), (2363, 8675), (3475, 5899)]