20657439

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{127}}^1$

素因数の和:228

約数の個数: 48

約数和(自身を含む): 34504704

約数和(自身を除く): 13847265

約数列:

[1, 3, 9, 11, 31, 33, 53, 93, 99, 127, 159, 279, 341, 381, 477, 583, 1023, 1143, 1397, 1643, 1749, 3069, 3937, 4191, 4929, 5247, 6731, 11811, 12573, 14787, 18073, 20193, 35433, 43307, 54219, 60579, 74041, 129921, 162657, 208661, 222123, 389763, 625983, 666369, 1877949, 2295271, 6885813, 20657439]

約数ペア:

[(1, 20657439), (3, 6885813), (9, 2295271), (11, 1877949), (31, 666369), (33, 625983), (53, 389763), (93, 222123), (99, 208661), (127, 162657), (159, 129921), (279, 74041), (341, 60579), (381, 54219), (477, 43307), (583, 35433), (1023, 20193), (1143, 18073), (1397, 14787), (1643, 12573), (1749, 11811), (3069, 6731), (3937, 5247), (4191, 4929)]