19977545

素因数分解:

$5^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{1117}}^1$

素因数の和:1209

約数の個数: 24

約数和(自身を含む): 28294344

約数和(自身を除く): 8316799

約数列:

[1, 5, 7, 35, 49, 73, 245, 365, 511, 1117, 2555, 3577, 5585, 7819, 17885, 39095, 54733, 81541, 273665, 407705, 570787, 2853935, 3995509, 19977545]

約数ペア:

[(1, 19977545), (5, 3995509), (7, 2853935), (35, 570787), (49, 407705), (73, 273665), (245, 81541), (365, 54733), (511, 39095), (1117, 17885), (2555, 7819), (3577, 5585)]