21495740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{2897}}^1$

素因数の和:2966

約数の個数: 48

約数和(自身を含む): 52581312

約数和(自身を除く): 31085572

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 53, 70, 106, 140, 212, 265, 371, 530, 742, 1060, 1484, 1855, 2897, 3710, 5794, 7420, 11588, 14485, 20279, 28970, 40558, 57940, 81116, 101395, 153541, 202790, 307082, 405580, 614164, 767705, 1074787, 1535410, 2149574, 3070820, 4299148, 5373935, 10747870, 21495740]

約数ペア:

[(1, 21495740), (2, 10747870), (4, 5373935), (5, 4299148), (7, 3070820), (10, 2149574), (14, 1535410), (20, 1074787), (28, 767705), (35, 614164), (53, 405580), (70, 307082), (106, 202790), (140, 153541), (212, 101395), (265, 81116), (371, 57940), (530, 40558), (742, 28970), (1060, 20279), (1484, 14485), (1855, 11588), (2897, 7420), (3710, 5794)]