81657640

素因数分解:

$2^3\times 5^1\times {\mathrm{269}}^1\times {\mathrm{7589}}^1$

素因数の和:7869

約数の個数: 32

約数和(自身を含む): 184437000

約数和(自身を除く): 102779360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 269, 538, 1076, 1345, 2152, 2690, 5380, 7589, 10760, 15178, 30356, 37945, 60712, 75890, 151780, 303560, 2041441, 4082882, 8165764, 10207205, 16331528, 20414410, 40828820, 81657640]

約数ペア:

[(1, 81657640), (2, 40828820), (4, 20414410), (5, 16331528), (8, 10207205), (10, 8165764), (20, 4082882), (40, 2041441), (269, 303560), (538, 151780), (1076, 75890), (1345, 60712), (2152, 37945), (2690, 30356), (5380, 15178), (7589, 10760)]