18878140

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{97}}^1\times {\mathrm{263}}^1$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 41291712

約数和(自身を除く): 22413572

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 97, 148, 185, 194, 263, 370, 388, 485, 526, 740, 970, 1052, 1315, 1940, 2630, 3589, 5260, 7178, 9731, 14356, 17945, 19462, 25511, 35890, 38924, 48655, 51022, 71780, 97310, 102044, 127555, 194620, 255110, 510220, 943907, 1887814, 3775628, 4719535, 9439070, 18878140]

約数ペア:

[(1, 18878140), (2, 9439070), (4, 4719535), (5, 3775628), (10, 1887814), (20, 943907), (37, 510220), (74, 255110), (97, 194620), (148, 127555), (185, 102044), (194, 97310), (263, 71780), (370, 51022), (388, 48655), (485, 38924), (526, 35890), (740, 25511), (970, 19462), (1052, 17945), (1315, 14356), (1940, 9731), (2630, 7178), (3589, 5260)]