28040980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{647}}^1$

素因数の和:864

約数の個数: 48

約数和(自身を含む): 64665216

約数和(自身を除く): 36624236

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 197, 220, 394, 647, 788, 985, 1294, 1970, 2167, 2588, 3235, 3940, 4334, 6470, 7117, 8668, 10835, 12940, 14234, 21670, 28468, 35585, 43340, 71170, 127459, 142340, 254918, 509836, 637295, 1274590, 1402049, 2549180, 2804098, 5608196, 7010245, 14020490, 28040980]

約数ペア:

[(1, 28040980), (2, 14020490), (4, 7010245), (5, 5608196), (10, 2804098), (11, 2549180), (20, 1402049), (22, 1274590), (44, 637295), (55, 509836), (110, 254918), (197, 142340), (220, 127459), (394, 71170), (647, 43340), (788, 35585), (985, 28468), (1294, 21670), (1970, 14234), (2167, 12940), (2588, 10835), (3235, 8668), (3940, 7117), (4334, 6470)]