19991451

素因数分解:

$3^1\times {\mathrm{127}}^1\times {\mathrm{137}}^1\times {\mathrm{383}}^1$

素因数の和:650

約数の個数: 16

約数和(自身を含む): 27131904

約数和(自身を除く): 7140453

約数列:

[1, 3, 127, 137, 381, 383, 411, 1149, 17399, 48641, 52197, 52471, 145923, 157413, 6663817, 19991451]

約数ペア:

[(1, 19991451), (3, 6663817), (127, 157413), (137, 145923), (381, 52471), (383, 52197), (411, 48641), (1149, 17399)]