21005104

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{42349}}^1$

素因数の和:42388

約数の個数: 20

約数和(自身を含む): 42011200

約数和(自身を除く): 21006096

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 248, 496, 42349, 84698, 169396, 338792, 677584, 1312819, 2625638, 5251276, 10502552, 21005104]

約数ペア:

[(1, 21005104), (2, 10502552), (4, 5251276), (8, 2625638), (16, 1312819), (31, 677584), (62, 338792), (124, 169396), (248, 84698), (496, 42349)]