20974551

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{349}}^1$

素因数の和:455

約数の個数: 32

約数和(自身を含む): 31987200

約数和(自身を除く): 11012649

約数列:

[1, 3, 13, 23, 39, 67, 69, 201, 299, 349, 871, 897, 1047, 1541, 2613, 4537, 4623, 8027, 13611, 20033, 23383, 24081, 60099, 70149, 104351, 303979, 313053, 537809, 911937, 1613427, 6991517, 20974551]

約数ペア:

[(1, 20974551), (3, 6991517), (13, 1613427), (23, 911937), (39, 537809), (67, 313053), (69, 303979), (201, 104351), (299, 70149), (349, 60099), (871, 24081), (897, 23383), (1047, 20033), (1541, 13611), (2613, 8027), (4537, 4623)]