209397981

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{127}}^1\times {\mathrm{631}}^1$

素因数の和:841

約数の個数: 32

約数和(自身を含む): 308051968

約数和(自身を除く): 98653987

約数列:

[1, 3, 13, 39, 67, 127, 201, 381, 631, 871, 1651, 1893, 2613, 4953, 8203, 8509, 24609, 25527, 42277, 80137, 110617, 126831, 240411, 331851, 549601, 1041781, 1648803, 3125343, 5369179, 16107537, 69799327, 209397981]

約数ペア:

[(1, 209397981), (3, 69799327), (13, 16107537), (39, 5369179), (67, 3125343), (127, 1648803), (201, 1041781), (381, 549601), (631, 331851), (871, 240411), (1651, 126831), (1893, 110617), (2613, 80137), (4953, 42277), (8203, 25527), (8509, 24609)]