18978687

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23173}}^1$

素因数の和:23199

約数の個数: 24

約数和(自身を含む): 33741344

約数和(自身を除く): 14762657

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819, 23173, 69519, 162211, 208557, 301249, 486633, 903747, 1459899, 2108743, 2711241, 6326229, 18978687]

約数ペア:

[(1, 18978687), (3, 6326229), (7, 2711241), (9, 2108743), (13, 1459899), (21, 903747), (39, 486633), (63, 301249), (91, 208557), (117, 162211), (273, 69519), (819, 23173)]