19911099

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{307}}^1\times {\mathrm{1663}}^1$

素因数の和:1986

約数の個数: 16

約数和(自身を含む): 28700672

約数和(自身を除く): 8789573

約数列:

[1, 3, 13, 39, 307, 921, 1663, 3991, 4989, 11973, 21619, 64857, 510541, 1531623, 6637033, 19911099]

約数ペア:

[(1, 19911099), (3, 6637033), (13, 1531623), (39, 510541), (307, 64857), (921, 21619), (1663, 11973), (3991, 4989)]