21252805

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1553}}^1$

素因数の和:1605

約数の個数: 32

約数和(自身を含む): 32223744

約数和(自身を除く): 10970939

約数列:

[1, 5, 7, 17, 23, 35, 85, 115, 119, 161, 391, 595, 805, 1553, 1955, 2737, 7765, 10871, 13685, 26401, 35719, 54355, 132005, 178595, 184807, 250033, 607223, 924035, 1250165, 3036115, 4250561, 21252805]

約数ペア:

[(1, 21252805), (5, 4250561), (7, 3036115), (17, 1250165), (23, 924035), (35, 607223), (85, 250033), (115, 184807), (119, 178595), (161, 132005), (391, 54355), (595, 35719), (805, 26401), (1553, 13685), (1955, 10871), (2737, 7765)]