81814240

素因数分解:

$2^5\times 5^1\times {\mathrm{223}}^1\times {\mathrm{2293}}^1$

素因数の和:2531

約数の個数: 48

約数和(自身を含む): 194237568

約数和(自身を除く): 112423328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 223, 446, 892, 1115, 1784, 2230, 2293, 3568, 4460, 4586, 7136, 8920, 9172, 11465, 17840, 18344, 22930, 35680, 36688, 45860, 73376, 91720, 183440, 366880, 511339, 1022678, 2045356, 2556695, 4090712, 5113390, 8181424, 10226780, 16362848, 20453560, 40907120, 81814240]

約数ペア:

[(1, 81814240), (2, 40907120), (4, 20453560), (5, 16362848), (8, 10226780), (10, 8181424), (16, 5113390), (20, 4090712), (32, 2556695), (40, 2045356), (80, 1022678), (160, 511339), (223, 366880), (446, 183440), (892, 91720), (1115, 73376), (1784, 45860), (2230, 36688), (2293, 35680), (3568, 22930), (4460, 18344), (4586, 17840), (7136, 11465), (8920, 9172)]