18874513

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{1987}}^1$

素因数の和:2076

約数の個数: 16

約数和(自身を含む): 22901760

約数和(自身を除く): 4027247

約数列:

[1, 7, 23, 59, 161, 413, 1357, 1987, 9499, 13909, 45701, 117233, 319907, 820631, 2696359, 18874513]

約数ペア:

[(1, 18874513), (7, 2696359), (23, 820631), (59, 319907), (161, 117233), (413, 45701), (1357, 13909), (1987, 9499)]