21735760

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2801}}^1$

素因数の和:2911

約数の個数: 40

約数和(自身を含む): 51074856

約数和(自身を除く): 29339096

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 2801, 3880, 5602, 7760, 11204, 14005, 22408, 28010, 44816, 56020, 112040, 224080, 271697, 543394, 1086788, 1358485, 2173576, 2716970, 4347152, 5433940, 10867880, 21735760]

約数ペア:

[(1, 21735760), (2, 10867880), (4, 5433940), (5, 4347152), (8, 2716970), (10, 2173576), (16, 1358485), (20, 1086788), (40, 543394), (80, 271697), (97, 224080), (194, 112040), (388, 56020), (485, 44816), (776, 28010), (970, 22408), (1552, 14005), (1940, 11204), (2801, 7760), (3880, 5602)]