217882140

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{518767}}^1$

素因数の和:518786

約数の個数: 48

約数和(自身を含む): 697224192

約数和(自身を除く): 479342052

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 518767, 1037534, 1556301, 2075068, 2593835, 3112602, 3631369, 5187670, 6225204, 7262738, 7781505, 10375340, 10894107, 14525476, 15563010, 18156845, 21788214, 31126020, 36313690, 43576428, 54470535, 72627380, 108941070, 217882140]

約数ペア:

[(1, 217882140), (2, 108941070), (3, 72627380), (4, 54470535), (5, 43576428), (6, 36313690), (7, 31126020), (10, 21788214), (12, 18156845), (14, 15563010), (15, 14525476), (20, 10894107), (21, 10375340), (28, 7781505), (30, 7262738), (35, 6225204), (42, 5187670), (60, 3631369), (70, 3112602), (84, 2593835), (105, 2075068), (140, 1556301), (210, 1037534), (420, 518767)]