21490360

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{6473}}^1$

素因数の和:6567

約数の個数: 32

約数和(自身を含む): 48943440

約数和(自身を除く): 27453080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 664, 830, 1660, 3320, 6473, 12946, 25892, 32365, 51784, 64730, 129460, 258920, 537259, 1074518, 2149036, 2686295, 4298072, 5372590, 10745180, 21490360]

約数ペア:

[(1, 21490360), (2, 10745180), (4, 5372590), (5, 4298072), (8, 2686295), (10, 2149036), (20, 1074518), (40, 537259), (83, 258920), (166, 129460), (332, 64730), (415, 51784), (664, 32365), (830, 25892), (1660, 12946), (3320, 6473)]