19865513

素因数分解:

${\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{107}}^1\times {\mathrm{113}}^1$

素因数の和:304

約数の個数: 16

約数和(自身を含む): 21275136

約数和(自身を除く): 1409623

約数列:

[1, 31, 53, 107, 113, 1643, 3317, 3503, 5671, 5989, 12091, 175801, 185659, 374821, 640823, 19865513]

約数ペア:

[(1, 19865513), (31, 640823), (53, 374821), (107, 185659), (113, 175801), (1643, 12091), (3317, 5989), (3503, 5671)]