21001820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{2239}}^1$

素因数の和:2322

約数の個数: 48

約数和(自身を含む): 51179520

約数和(自身を除く): 30177700

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 67, 70, 134, 140, 268, 335, 469, 670, 938, 1340, 1876, 2239, 2345, 4478, 4690, 8956, 9380, 11195, 15673, 22390, 31346, 44780, 62692, 78365, 150013, 156730, 300026, 313460, 600052, 750065, 1050091, 1500130, 2100182, 3000260, 4200364, 5250455, 10500910, 21001820]

約数ペア:

[(1, 21001820), (2, 10500910), (4, 5250455), (5, 4200364), (7, 3000260), (10, 2100182), (14, 1500130), (20, 1050091), (28, 750065), (35, 600052), (67, 313460), (70, 300026), (134, 156730), (140, 150013), (268, 78365), (335, 62692), (469, 44780), (670, 31346), (938, 22390), (1340, 15673), (1876, 11195), (2239, 9380), (2345, 8956), (4478, 4690)]