20198840

素因数分解:

$2^3\times 5^1\times {\mathrm{277}}^1\times {\mathrm{1823}}^1$

素因数の和:2111

約数の個数: 32

約数和(自身を含む): 45636480

約数和(自身を除く): 25437640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 277, 554, 1108, 1385, 1823, 2216, 2770, 3646, 5540, 7292, 9115, 11080, 14584, 18230, 36460, 72920, 504971, 1009942, 2019884, 2524855, 4039768, 5049710, 10099420, 20198840]

約数ペア:

[(1, 20198840), (2, 10099420), (4, 5049710), (5, 4039768), (8, 2524855), (10, 2019884), (20, 1009942), (40, 504971), (277, 72920), (554, 36460), (1108, 18230), (1385, 14584), (1823, 11080), (2216, 9115), (2770, 7292), (3646, 5540)]