20521700

素因数分解:

$2^2\times 5^2\times {\mathrm{163}}^1\times {\mathrm{1259}}^1$

素因数の和:1436

約数の個数: 36

約数和(自身を含む): 44840880

約数和(自身を除く): 24319180

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 163, 326, 652, 815, 1259, 1630, 2518, 3260, 4075, 5036, 6295, 8150, 12590, 16300, 25180, 31475, 62950, 125900, 205217, 410434, 820868, 1026085, 2052170, 4104340, 5130425, 10260850, 20521700]

約数ペア:

[(1, 20521700), (2, 10260850), (4, 5130425), (5, 4104340), (10, 2052170), (20, 1026085), (25, 820868), (50, 410434), (100, 205217), (163, 125900), (326, 62950), (652, 31475), (815, 25180), (1259, 16300), (1630, 12590), (2518, 8150), (3260, 6295), (4075, 5036)]