217857591

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{4919}}^1$

素因数の和:4988

約数の個数: 48

約数和(自身を含む): 388876800

約数和(自身を除く): 171019209

約数列:

[1, 3, 7, 9, 19, 21, 37, 57, 63, 111, 133, 171, 259, 333, 399, 703, 777, 1197, 2109, 2331, 4919, 4921, 6327, 14757, 14763, 34433, 44271, 44289, 93461, 103299, 182003, 280383, 309897, 546009, 654227, 841149, 1274021, 1638027, 1962681, 3458057, 3822063, 5888043, 10374171, 11466189, 24206399, 31122513, 72619197, 217857591]

約数ペア:

[(1, 217857591), (3, 72619197), (7, 31122513), (9, 24206399), (19, 11466189), (21, 10374171), (37, 5888043), (57, 3822063), (63, 3458057), (111, 1962681), (133, 1638027), (171, 1274021), (259, 841149), (333, 654227), (399, 546009), (703, 309897), (777, 280383), (1197, 182003), (2109, 103299), (2331, 93461), (4919, 44289), (4921, 44271), (6327, 34433), (14757, 14763)]