257202120

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{306193}}^1$

素因数の和:306214

約数の個数: 64

約数和(自身を含む): 881838720

約数和(自身を除く): 624636600

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 306193, 612386, 918579, 1224772, 1530965, 1837158, 2143351, 2449544, 3061930, 3674316, 4286702, 4592895, 6123860, 6430053, 7348632, 8573404, 9185790, 10716755, 12247720, 12860106, 17146808, 18371580, 21433510, 25720212, 32150265, 36743160, 42867020, 51440424, 64300530, 85734040, 128601060, 257202120]

約数ペア:

[(1, 257202120), (2, 128601060), (3, 85734040), (4, 64300530), (5, 51440424), (6, 42867020), (7, 36743160), (8, 32150265), (10, 25720212), (12, 21433510), (14, 18371580), (15, 17146808), (20, 12860106), (21, 12247720), (24, 10716755), (28, 9185790), (30, 8573404), (35, 7348632), (40, 6430053), (42, 6123860), (56, 4592895), (60, 4286702), (70, 3674316), (84, 3061930), (105, 2449544), (120, 2143351), (140, 1837158), (168, 1530965), (210, 1224772), (280, 918579), (420, 612386), (840, 306193)]