20491545

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{29}}^1\times {\mathrm{163}}^1$

素因数の和:234

約数の個数: 48

約数和(自身を含む): 36250560

約数和(自身を除く): 15759015

約数列:

[1, 3, 5, 15, 17, 29, 51, 85, 87, 145, 163, 255, 289, 435, 489, 493, 815, 867, 1445, 1479, 2445, 2465, 2771, 4335, 4727, 7395, 8313, 8381, 13855, 14181, 23635, 25143, 41565, 41905, 47107, 70905, 80359, 125715, 141321, 235535, 241077, 401795, 706605, 1205385, 1366103, 4098309, 6830515, 20491545]

約数ペア:

[(1, 20491545), (3, 6830515), (5, 4098309), (15, 1366103), (17, 1205385), (29, 706605), (51, 401795), (85, 241077), (87, 235535), (145, 141321), (163, 125715), (255, 80359), (289, 70905), (435, 47107), (489, 41905), (493, 41565), (815, 25143), (867, 23635), (1445, 14181), (1479, 13855), (2445, 8381), (2465, 8313), (2771, 7395), (4335, 4727)]