201721900

素因数分解:

$2^2\times 5^2\times {\mathrm{1213}}^1\times {\mathrm{1663}}^1$

素因数の和:2890

約数の個数: 36

約数和(自身を含む): 438360832

約数和(自身を除く): 236638932

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 1213, 1663, 2426, 3326, 4852, 6065, 6652, 8315, 12130, 16630, 24260, 30325, 33260, 41575, 60650, 83150, 121300, 166300, 2017219, 4034438, 8068876, 10086095, 20172190, 40344380, 50430475, 100860950, 201721900]

約数ペア:

[(1, 201721900), (2, 100860950), (4, 50430475), (5, 40344380), (10, 20172190), (20, 10086095), (25, 8068876), (50, 4034438), (100, 2017219), (1213, 166300), (1663, 121300), (2426, 83150), (3326, 60650), (4852, 41575), (6065, 33260), (6652, 30325), (8315, 24260), (12130, 16630)]