20284640

素因数分解:

$2^5\times 5^1\times {\mathrm{97}}^1\times {\mathrm{1307}}^1$

素因数の和:1419

約数の個数: 48

約数和(自身を含む): 48453552

約数和(自身を除く): 28168912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 97, 160, 194, 388, 485, 776, 970, 1307, 1552, 1940, 2614, 3104, 3880, 5228, 6535, 7760, 10456, 13070, 15520, 20912, 26140, 41824, 52280, 104560, 126779, 209120, 253558, 507116, 633895, 1014232, 1267790, 2028464, 2535580, 4056928, 5071160, 10142320, 20284640]

約数ペア:

[(1, 20284640), (2, 10142320), (4, 5071160), (5, 4056928), (8, 2535580), (10, 2028464), (16, 1267790), (20, 1014232), (32, 633895), (40, 507116), (80, 253558), (97, 209120), (160, 126779), (194, 104560), (388, 52280), (485, 41824), (776, 26140), (970, 20912), (1307, 15520), (1552, 13070), (1940, 10456), (2614, 7760), (3104, 6535), (3880, 5228)]