21001225

素因数分解:

$5^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{2927}}^1$

素因数の和:2985

約数の個数: 24

約数和(自身を含む): 30498048

約数和(自身を除く): 9496823

約数列:

[1, 5, 7, 25, 35, 41, 175, 205, 287, 1025, 1435, 2927, 7175, 14635, 20489, 73175, 102445, 120007, 512225, 600035, 840049, 3000175, 4200245, 21001225]

約数ペア:

[(1, 21001225), (5, 4200245), (7, 3000175), (25, 840049), (35, 600035), (41, 512225), (175, 120007), (205, 102445), (287, 73175), (1025, 20489), (1435, 14635), (2927, 7175)]