21471700

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{5237}}^1$

素因数の和:5292

約数の個数: 36

約数和(自身を含む): 47739132

約数和(自身を除く): 26267432

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 164, 205, 410, 820, 1025, 2050, 4100, 5237, 10474, 20948, 26185, 52370, 104740, 130925, 214717, 261850, 429434, 523700, 858868, 1073585, 2147170, 4294340, 5367925, 10735850, 21471700]

約数ペア:

[(1, 21471700), (2, 10735850), (4, 5367925), (5, 4294340), (10, 2147170), (20, 1073585), (25, 858868), (41, 523700), (50, 429434), (82, 261850), (100, 214717), (164, 130925), (205, 104740), (410, 52370), (820, 26185), (1025, 20948), (2050, 10474), (4100, 5237)]