21240178

素因数分解:

$2^1\times {\mathrm{23}}^1\times {\mathrm{389}}^1\times {\mathrm{1187}}^1$

素因数の和:1601

約数の個数: 16

約数和(自身を含む): 33359040

約数和(自身を除く): 12118862

約数列:

[1, 2, 23, 46, 389, 778, 1187, 2374, 8947, 17894, 27301, 54602, 461743, 923486, 10620089, 21240178]

約数ペア:

[(1, 21240178), (2, 10620089), (23, 923486), (46, 461743), (389, 54602), (778, 27301), (1187, 17894), (2374, 8947)]