21055363

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{103}}^1$

素因数の和:211

約数の個数: 32

約数和(自身を含む): 26956800

約数和(自身を除く): 5901437

約数列:

[1, 7, 19, 29, 53, 103, 133, 203, 371, 551, 721, 1007, 1537, 1957, 2987, 3857, 5459, 7049, 10759, 13699, 20909, 29203, 38213, 56753, 103721, 158311, 204421, 397271, 726047, 1108177, 3007909, 21055363]

約数ペア:

[(1, 21055363), (7, 3007909), (19, 1108177), (29, 726047), (53, 397271), (103, 204421), (133, 158311), (203, 103721), (371, 56753), (551, 38213), (721, 29203), (1007, 20909), (1537, 13699), (1957, 10759), (2987, 7049), (3857, 5459)]