19818939

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{1109}}^1$

素因数の和:1179

約数の個数: 32

約数和(自身を含む): 32394240

約数和(自身を除く): 12575301

約数列:

[1, 3, 7, 21, 23, 37, 69, 111, 161, 259, 483, 777, 851, 1109, 2553, 3327, 5957, 7763, 17871, 23289, 25507, 41033, 76521, 123099, 178549, 287231, 535647, 861693, 943759, 2831277, 6606313, 19818939]

約数ペア:

[(1, 19818939), (3, 6606313), (7, 2831277), (21, 943759), (23, 861693), (37, 535647), (69, 287231), (111, 178549), (161, 123099), (259, 76521), (483, 41033), (777, 25507), (851, 23289), (1109, 17871), (2553, 7763), (3327, 5957)]