21137640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{353}}^1\times {\mathrm{499}}^1$

素因数の和:866

約数の個数: 64

約数和(自身を含む): 63720000

約数和(自身を除く): 42582360

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 353, 499, 706, 998, 1059, 1412, 1497, 1765, 1996, 2118, 2495, 2824, 2994, 3530, 3992, 4236, 4990, 5295, 5988, 7060, 7485, 8472, 9980, 10590, 11976, 14120, 14970, 19960, 21180, 29940, 42360, 59880, 176147, 352294, 528441, 704588, 880735, 1056882, 1409176, 1761470, 2113764, 2642205, 3522940, 4227528, 5284410, 7045880, 10568820, 21137640]

約数ペア:

[(1, 21137640), (2, 10568820), (3, 7045880), (4, 5284410), (5, 4227528), (6, 3522940), (8, 2642205), (10, 2113764), (12, 1761470), (15, 1409176), (20, 1056882), (24, 880735), (30, 704588), (40, 528441), (60, 352294), (120, 176147), (353, 59880), (499, 42360), (706, 29940), (998, 21180), (1059, 19960), (1412, 14970), (1497, 14120), (1765, 11976), (1996, 10590), (2118, 9980), (2495, 8472), (2824, 7485), (2994, 7060), (3530, 5988), (3992, 5295), (4236, 4990)]