28729240

素因数分解:

$2^3\times 5^1\times {\mathrm{643}}^1\times {\mathrm{1117}}^1$

素因数の和:1771

約数の個数: 32

約数和(自身を含む): 64799280

約数和(自身を除く): 36070040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 643, 1117, 1286, 2234, 2572, 3215, 4468, 5144, 5585, 6430, 8936, 11170, 12860, 22340, 25720, 44680, 718231, 1436462, 2872924, 3591155, 5745848, 7182310, 14364620, 28729240]

約数ペア:

[(1, 28729240), (2, 14364620), (4, 7182310), (5, 5745848), (8, 3591155), (10, 2872924), (20, 1436462), (40, 718231), (643, 44680), (1117, 25720), (1286, 22340), (2234, 12860), (2572, 11170), (3215, 8936), (4468, 6430), (5144, 5585)]