18843881

素因数分解:

$7^2\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{149}}^1$

素因数の和:281

約数の個数: 24

約数和(自身を含む): 23085000

約数和(自身を除く): 4241119

約数列:

[1, 7, 29, 49, 89, 149, 203, 623, 1043, 1421, 2581, 4321, 4361, 7301, 13261, 18067, 30247, 92827, 126469, 211729, 384569, 649789, 2691983, 18843881]

約数ペア:

[(1, 18843881), (7, 2691983), (29, 649789), (49, 384569), (89, 211729), (149, 126469), (203, 92827), (623, 30247), (1043, 18067), (1421, 13261), (2581, 7301), (4321, 4361)]