639465729

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{228953}}^1$

素因数の和:228989

約数の個数: 24

約数和(自身を含む): 1044030240

約数和(自身を除く): 404564511

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 228953, 686859, 1602671, 4350107, 4808013, 11218697, 13050321, 30450749, 33656091, 91352247, 213155243, 639465729]

約数ペア:

[(1, 639465729), (3, 213155243), (7, 91352247), (19, 33656091), (21, 30450749), (49, 13050321), (57, 11218697), (133, 4808013), (147, 4350107), (399, 1602671), (931, 686859), (2793, 228953)]