18860225

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{199}}^1\times {\mathrm{223}}^1$

素因数の和:449

約数の個数: 24

約数和(自身を含む): 24998400

約数和(自身を除く): 6138175

約数列:

[1, 5, 17, 25, 85, 199, 223, 425, 995, 1115, 3383, 3791, 4975, 5575, 16915, 18955, 44377, 84575, 94775, 221885, 754409, 1109425, 3772045, 18860225]

約数ペア:

[(1, 18860225), (5, 3772045), (17, 1109425), (25, 754409), (85, 221885), (199, 94775), (223, 84575), (425, 44377), (995, 18955), (1115, 16915), (3383, 5575), (3791, 4975)]