18701781

素因数分解:

$3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{107}}^1$

素因数の和:194

約数の個数: 48

約数和(自身を含む): 31026240

約数和(自身を除く): 12324459

約数列:

[1, 3, 7, 21, 29, 41, 49, 87, 107, 123, 147, 203, 287, 321, 609, 749, 861, 1189, 1421, 2009, 2247, 3103, 3567, 4263, 4387, 5243, 6027, 8323, 9309, 13161, 15729, 21721, 24969, 30709, 58261, 65163, 92127, 127223, 152047, 174783, 214963, 381669, 456141, 644889, 890561, 2671683, 6233927, 18701781]

約数ペア:

[(1, 18701781), (3, 6233927), (7, 2671683), (21, 890561), (29, 644889), (41, 456141), (49, 381669), (87, 214963), (107, 174783), (123, 152047), (147, 127223), (203, 92127), (287, 65163), (321, 58261), (609, 30709), (749, 24969), (861, 21721), (1189, 15729), (1421, 13161), (2009, 9309), (2247, 8323), (3103, 6027), (3567, 5243), (4263, 4387)]