18689853

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{223}}^1\times {\mathrm{307}}^1$

素因数の和:553

約数の個数: 32

約数和(自身を含む): 30908416

約数和(自身を除く): 12218563

約数列:

[1, 3, 7, 13, 21, 39, 91, 223, 273, 307, 669, 921, 1561, 2149, 2899, 3991, 4683, 6447, 8697, 11973, 20293, 27937, 60879, 68461, 83811, 205383, 479227, 889993, 1437681, 2669979, 6229951, 18689853]

約数ペア:

[(1, 18689853), (3, 6229951), (7, 2669979), (13, 1437681), (21, 889993), (39, 479227), (91, 205383), (223, 83811), (273, 68461), (307, 60879), (669, 27937), (921, 20293), (1561, 11973), (2149, 8697), (2899, 6447), (3991, 4683)]