81251660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{6521}}^1$

素因数の和:6626

約数の個数: 48

約数和(自身を含む): 197225280

約数和(自身を除く): 115973620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 89, 140, 178, 356, 445, 623, 890, 1246, 1780, 2492, 3115, 6230, 6521, 12460, 13042, 26084, 32605, 45647, 65210, 91294, 130420, 182588, 228235, 456470, 580369, 912940, 1160738, 2321476, 2901845, 4062583, 5803690, 8125166, 11607380, 16250332, 20312915, 40625830, 81251660]

約数ペア:

[(1, 81251660), (2, 40625830), (4, 20312915), (5, 16250332), (7, 11607380), (10, 8125166), (14, 5803690), (20, 4062583), (28, 2901845), (35, 2321476), (70, 1160738), (89, 912940), (140, 580369), (178, 456470), (356, 228235), (445, 182588), (623, 130420), (890, 91294), (1246, 65210), (1780, 45647), (2492, 32605), (3115, 26084), (6230, 13042), (6521, 12460)]