19819040

素因数分解:

$2^5\times 5^1\times {\mathrm{97}}^1\times {\mathrm{1277}}^1$

素因数の和:1389

約数の個数: 48

約数和(自身を含む): 47342232

約数和(自身を除く): 27523192

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 97, 160, 194, 388, 485, 776, 970, 1277, 1552, 1940, 2554, 3104, 3880, 5108, 6385, 7760, 10216, 12770, 15520, 20432, 25540, 40864, 51080, 102160, 123869, 204320, 247738, 495476, 619345, 990952, 1238690, 1981904, 2477380, 3963808, 4954760, 9909520, 19819040]

約数ペア:

[(1, 19819040), (2, 9909520), (4, 4954760), (5, 3963808), (8, 2477380), (10, 1981904), (16, 1238690), (20, 990952), (32, 619345), (40, 495476), (80, 247738), (97, 204320), (160, 123869), (194, 102160), (388, 51080), (485, 40864), (776, 25540), (970, 20432), (1277, 15520), (1552, 12770), (1940, 10216), (2554, 7760), (3104, 6385), (3880, 5108)]