21695380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{353}}^1\times {\mathrm{439}}^1$

素因数の和:808

約数の個数: 48

約数和(自身を含む): 52335360

約数和(自身を除く): 30639980

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 353, 439, 706, 878, 1412, 1756, 1765, 2195, 2471, 3073, 3530, 4390, 4942, 6146, 7060, 8780, 9884, 12292, 12355, 15365, 24710, 30730, 49420, 61460, 154967, 309934, 619868, 774835, 1084769, 1549670, 2169538, 3099340, 4339076, 5423845, 10847690, 21695380]

約数ペア:

[(1, 21695380), (2, 10847690), (4, 5423845), (5, 4339076), (7, 3099340), (10, 2169538), (14, 1549670), (20, 1084769), (28, 774835), (35, 619868), (70, 309934), (140, 154967), (353, 61460), (439, 49420), (706, 30730), (878, 24710), (1412, 15365), (1756, 12355), (1765, 12292), (2195, 9884), (2471, 8780), (3073, 7060), (3530, 6146), (4390, 4942)]