18945628

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{229}}^1$

素因数の和:326

約数の個数: 48

約数和(自身を含む): 37686880

約数和(自身を除く): 18741252

約数列:

[1, 2, 4, 13, 26, 37, 43, 52, 74, 86, 148, 172, 229, 458, 481, 559, 916, 962, 1118, 1591, 1924, 2236, 2977, 3182, 5954, 6364, 8473, 9847, 11908, 16946, 19694, 20683, 33892, 39388, 41366, 82732, 110149, 128011, 220298, 256022, 364339, 440596, 512044, 728678, 1457356, 4736407, 9472814, 18945628]

約数ペア:

[(1, 18945628), (2, 9472814), (4, 4736407), (13, 1457356), (26, 728678), (37, 512044), (43, 440596), (52, 364339), (74, 256022), (86, 220298), (148, 128011), (172, 110149), (229, 82732), (458, 41366), (481, 39388), (559, 33892), (916, 20683), (962, 19694), (1118, 16946), (1591, 11908), (1924, 9847), (2236, 8473), (2977, 6364), (3182, 5954)]