81487760

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{10501}}^1$

素因数の和:10611

約数の個数: 40

約数和(自身を含む): 191430456

約数和(自身を除く): 109942696

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 3880, 7760, 10501, 21002, 42004, 52505, 84008, 105010, 168016, 210020, 420040, 840080, 1018597, 2037194, 4074388, 5092985, 8148776, 10185970, 16297552, 20371940, 40743880, 81487760]

約数ペア:

[(1, 81487760), (2, 40743880), (4, 20371940), (5, 16297552), (8, 10185970), (10, 8148776), (16, 5092985), (20, 4074388), (40, 2037194), (80, 1018597), (97, 840080), (194, 420040), (388, 210020), (485, 168016), (776, 105010), (970, 84008), (1552, 52505), (1940, 42004), (3880, 21002), (7760, 10501)]