18004975

素因数分解:

$5^2\times {\mathrm{23}}^1\times {\mathrm{173}}^1\times {\mathrm{181}}^1$

素因数の和:387

約数の個数: 24

約数和(自身を含む): 23560992

約数和(自身を除く): 5556017

約数列:

[1, 5, 23, 25, 115, 173, 181, 575, 865, 905, 3979, 4163, 4325, 4525, 19895, 20815, 31313, 99475, 104075, 156565, 720199, 782825, 3600995, 18004975]

約数ペア:

[(1, 18004975), (5, 3600995), (23, 782825), (25, 720199), (115, 156565), (173, 104075), (181, 99475), (575, 31313), (865, 20815), (905, 19895), (3979, 4525), (4163, 4325)]