18964225

素因数分解:

$5^2\times 7^2\times {\mathrm{113}}^1\times {\mathrm{137}}^1$

素因数の和:274

約数の個数: 36

約数和(自身を含む): 27798444

約数和(自身を除く): 8834219

約数列:

[1, 5, 7, 25, 35, 49, 113, 137, 175, 245, 565, 685, 791, 959, 1225, 2825, 3425, 3955, 4795, 5537, 6713, 15481, 19775, 23975, 27685, 33565, 77405, 108367, 138425, 167825, 387025, 541835, 758569, 2709175, 3792845, 18964225]

約数ペア:

[(1, 18964225), (5, 3792845), (7, 2709175), (25, 758569), (35, 541835), (49, 387025), (113, 167825), (137, 138425), (175, 108367), (245, 77405), (565, 33565), (685, 27685), (791, 23975), (959, 19775), (1225, 15481), (2825, 6713), (3425, 5537), (3955, 4795)]