81224320

素因数分解:

$2^7\times 5^1\times {\mathrm{126913}}^1$

素因数の和:126932

約数の個数: 32

約数和(自身を含む): 194178420

約数和(自身を除く): 112954100

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 126913, 253826, 507652, 634565, 1015304, 1269130, 2030608, 2538260, 4061216, 5076520, 8122432, 10153040, 16244864, 20306080, 40612160, 81224320]

約数ペア:

[(1, 81224320), (2, 40612160), (4, 20306080), (5, 16244864), (8, 10153040), (10, 8122432), (16, 5076520), (20, 4061216), (32, 2538260), (40, 2030608), (64, 1269130), (80, 1015304), (128, 634565), (160, 507652), (320, 253826), (640, 126913)]