123456220

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{227}}^1\times {\mathrm{383}}^1$

素因数の和:690

約数の個数: 48

約数和(自身を含む): 264757248

約数和(自身を除く): 141301028

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 227, 284, 355, 383, 454, 710, 766, 908, 1135, 1420, 1532, 1915, 2270, 3830, 4540, 7660, 16117, 27193, 32234, 54386, 64468, 80585, 86941, 108772, 135965, 161170, 173882, 271930, 322340, 347764, 434705, 543860, 869410, 1738820, 6172811, 12345622, 24691244, 30864055, 61728110, 123456220]

約数ペア:

[(1, 123456220), (2, 61728110), (4, 30864055), (5, 24691244), (10, 12345622), (20, 6172811), (71, 1738820), (142, 869410), (227, 543860), (284, 434705), (355, 347764), (383, 322340), (454, 271930), (710, 173882), (766, 161170), (908, 135965), (1135, 108772), (1420, 86941), (1532, 80585), (1915, 64468), (2270, 54386), (3830, 32234), (4540, 27193), (7660, 16117)]