19978049

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^2$

素因数の和:201

約数の個数: 24

約数和(自身を含む): 25421760

約数和(自身を除く): 5443711

約数列:

[1, 7, 13, 59, 61, 91, 413, 427, 767, 793, 3599, 3721, 5369, 5551, 25193, 26047, 46787, 48373, 219539, 327509, 338611, 1536773, 2854007, 19978049]

約数ペア:

[(1, 19978049), (7, 2854007), (13, 1536773), (59, 338611), (61, 327509), (91, 219539), (413, 48373), (427, 46787), (767, 26047), (793, 25193), (3599, 5551), (3721, 5369)]