21182425

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{197}}^1$

素因数の和:258

約数の個数: 48

約数和(自身を含む): 31819392

約数和(自身を除く): 10636967

約数列:

[1, 5, 11, 17, 23, 25, 55, 85, 115, 187, 197, 253, 275, 391, 425, 575, 935, 985, 1265, 1955, 2167, 3349, 4301, 4531, 4675, 4925, 6325, 9775, 10835, 16745, 21505, 22655, 36839, 49841, 54175, 77027, 83725, 107525, 113275, 184195, 249205, 385135, 847297, 920975, 1246025, 1925675, 4236485, 21182425]

約数ペア:

[(1, 21182425), (5, 4236485), (11, 1925675), (17, 1246025), (23, 920975), (25, 847297), (55, 385135), (85, 249205), (115, 184195), (187, 113275), (197, 107525), (253, 83725), (275, 77027), (391, 54175), (425, 49841), (575, 36839), (935, 22655), (985, 21505), (1265, 16745), (1955, 10835), (2167, 9775), (3349, 6325), (4301, 4925), (4531, 4675)]