19999260

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{811}}^1$

素因数の和:963

約数の個数: 72

約数和(自身を含む): 61182576

約数和(自身を除く): 41183316

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 137, 180, 274, 411, 548, 685, 811, 822, 1233, 1370, 1622, 1644, 2055, 2433, 2466, 2740, 3244, 4055, 4110, 4866, 4932, 6165, 7299, 8110, 8220, 9732, 12165, 12330, 14598, 16220, 24330, 24660, 29196, 36495, 48660, 72990, 111107, 145980, 222214, 333321, 444428, 555535, 666642, 999963, 1111070, 1333284, 1666605, 1999926, 2222140, 3333210, 3999852, 4999815, 6666420, 9999630, 19999260]

約数ペア:

[(1, 19999260), (2, 9999630), (3, 6666420), (4, 4999815), (5, 3999852), (6, 3333210), (9, 2222140), (10, 1999926), (12, 1666605), (15, 1333284), (18, 1111070), (20, 999963), (30, 666642), (36, 555535), (45, 444428), (60, 333321), (90, 222214), (137, 145980), (180, 111107), (274, 72990), (411, 48660), (548, 36495), (685, 29196), (811, 24660), (822, 24330), (1233, 16220), (1370, 14598), (1622, 12330), (1644, 12165), (2055, 9732), (2433, 8220), (2466, 8110), (2740, 7299), (3244, 6165), (4055, 4932), (4110, 4866)]