21097180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1531}}^1$

素因数の和:1606

約数の個数: 48

約数和(自身を含む): 48644064

約数和(自身を除く): 27546884

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 53, 65, 106, 130, 212, 260, 265, 530, 689, 1060, 1378, 1531, 2756, 3062, 3445, 6124, 6890, 7655, 13780, 15310, 19903, 30620, 39806, 79612, 81143, 99515, 162286, 199030, 324572, 398060, 405715, 811430, 1054859, 1622860, 2109718, 4219436, 5274295, 10548590, 21097180]

約数ペア:

[(1, 21097180), (2, 10548590), (4, 5274295), (5, 4219436), (10, 2109718), (13, 1622860), (20, 1054859), (26, 811430), (52, 405715), (53, 398060), (65, 324572), (106, 199030), (130, 162286), (212, 99515), (260, 81143), (265, 79612), (530, 39806), (689, 30620), (1060, 19903), (1378, 15310), (1531, 13780), (2756, 7655), (3062, 6890), (3445, 6124)]