28724120

素因数分解:

$2^3\times 5^1\times {\mathrm{443}}^1\times {\mathrm{1621}}^1$

素因数の和:2075

約数の個数: 32

約数和(自身を含む): 64815120

約数和(自身を除く): 36091000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 443, 886, 1621, 1772, 2215, 3242, 3544, 4430, 6484, 8105, 8860, 12968, 16210, 17720, 32420, 64840, 718103, 1436206, 2872412, 3590515, 5744824, 7181030, 14362060, 28724120]

約数ペア:

[(1, 28724120), (2, 14362060), (4, 7181030), (5, 5744824), (8, 3590515), (10, 2872412), (20, 1436206), (40, 718103), (443, 64840), (886, 32420), (1621, 17720), (1772, 16210), (2215, 12968), (3242, 8860), (3544, 8105), (4430, 6484)]