28154840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{193}}^1\times {\mathrm{521}}^1$

素因数の和:732

約数の個数: 64

約数和(自身を含む): 72912960

約数和(自身を除く): 44758120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 193, 280, 386, 521, 772, 965, 1042, 1351, 1544, 1930, 2084, 2605, 2702, 3647, 3860, 4168, 5210, 5404, 6755, 7294, 7720, 10420, 10808, 13510, 14588, 18235, 20840, 27020, 29176, 36470, 54040, 72940, 100553, 145880, 201106, 402212, 502765, 703871, 804424, 1005530, 1407742, 2011060, 2815484, 3519355, 4022120, 5630968, 7038710, 14077420, 28154840]

約数ペア:

[(1, 28154840), (2, 14077420), (4, 7038710), (5, 5630968), (7, 4022120), (8, 3519355), (10, 2815484), (14, 2011060), (20, 1407742), (28, 1005530), (35, 804424), (40, 703871), (56, 502765), (70, 402212), (140, 201106), (193, 145880), (280, 100553), (386, 72940), (521, 54040), (772, 36470), (965, 29176), (1042, 27020), (1351, 20840), (1544, 18235), (1930, 14588), (2084, 13510), (2605, 10808), (2702, 10420), (3647, 7720), (3860, 7294), (4168, 6755), (5210, 5404)]