391107880

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{100801}}^1$

素因数の和:100909

約数の個数: 32

約数和(自身を含む): 889073640

約数和(自身を除く): 497965760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 100801, 201602, 403204, 504005, 806408, 1008010, 2016020, 4032040, 9777697, 19555394, 39110788, 48888485, 78221576, 97776970, 195553940, 391107880]

約数ペア:

[(1, 391107880), (2, 195553940), (4, 97776970), (5, 78221576), (8, 48888485), (10, 39110788), (20, 19555394), (40, 9777697), (97, 4032040), (194, 2016020), (388, 1008010), (485, 806408), (776, 504005), (970, 403204), (1940, 201602), (3880, 100801)]