21493340

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{151}}^1\times {\mathrm{647}}^1$

素因数の和:818

約数の個数: 48

約数和(自身を含む): 49641984

約数和(自身を除く): 28148644

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 151, 220, 302, 604, 647, 755, 1294, 1510, 1661, 2588, 3020, 3235, 3322, 6470, 6644, 7117, 8305, 12940, 14234, 16610, 28468, 33220, 35585, 71170, 97697, 142340, 195394, 390788, 488485, 976970, 1074667, 1953940, 2149334, 4298668, 5373335, 10746670, 21493340]

約数ペア:

[(1, 21493340), (2, 10746670), (4, 5373335), (5, 4298668), (10, 2149334), (11, 1953940), (20, 1074667), (22, 976970), (44, 488485), (55, 390788), (110, 195394), (151, 142340), (220, 97697), (302, 71170), (604, 35585), (647, 33220), (755, 28468), (1294, 16610), (1510, 14234), (1661, 12940), (2588, 8305), (3020, 7117), (3235, 6644), (3322, 6470)]