20990193

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1697}}^1$

素因数の和:1757

約数の個数: 32

約数和(自身を含む): 34775040

約数和(自身を除く): 13784847

約数列:

[1, 3, 7, 19, 21, 31, 57, 93, 133, 217, 399, 589, 651, 1697, 1767, 4123, 5091, 11879, 12369, 32243, 35637, 52607, 96729, 157821, 225701, 368249, 677103, 999533, 1104747, 2998599, 6996731, 20990193]

約数ペア:

[(1, 20990193), (3, 6996731), (7, 2998599), (19, 1104747), (21, 999533), (31, 677103), (57, 368249), (93, 225701), (133, 157821), (217, 96729), (399, 52607), (589, 35637), (651, 32243), (1697, 12369), (1767, 11879), (4123, 5091)]