19720240

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{4651}}^1$

素因数の和:4717

約数の個数: 40

約数和(自身を含む): 46724688

約数和(自身を除く): 27004448

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 212, 265, 424, 530, 848, 1060, 2120, 4240, 4651, 9302, 18604, 23255, 37208, 46510, 74416, 93020, 186040, 246503, 372080, 493006, 986012, 1232515, 1972024, 2465030, 3944048, 4930060, 9860120, 19720240]

約数ペア:

[(1, 19720240), (2, 9860120), (4, 4930060), (5, 3944048), (8, 2465030), (10, 1972024), (16, 1232515), (20, 986012), (40, 493006), (53, 372080), (80, 246503), (106, 186040), (212, 93020), (265, 74416), (424, 46510), (530, 37208), (848, 23255), (1060, 18604), (2120, 9302), (4240, 4651)]