391880

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{101}}^1$

素因数の和:209

約数の個数: 32

約数和(自身を含む): 899640

約数和(自身を除く): 507760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 101, 194, 202, 388, 404, 485, 505, 776, 808, 970, 1010, 1940, 2020, 3880, 4040, 9797, 19594, 39188, 48985, 78376, 97970, 195940, 391880]

約数ペア:

[(1, 391880), (2, 195940), (4, 97970), (5, 78376), (8, 48985), (10, 39188), (20, 19594), (40, 9797), (97, 4040), (101, 3880), (194, 2020), (202, 1940), (388, 1010), (404, 970), (485, 808), (505, 776)]