19991559

素因数分解:

$3^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{107}}^1$

素因数の和:196

約数の個数: 48

約数和(自身を含む): 33094656

約数和(自身を除く): 13103097

約数列:

[1, 3, 7, 21, 31, 41, 49, 93, 107, 123, 147, 217, 287, 321, 651, 749, 861, 1271, 1519, 2009, 2247, 3317, 3813, 4387, 4557, 5243, 6027, 8897, 9951, 13161, 15729, 23219, 26691, 30709, 62279, 69657, 92127, 135997, 162533, 186837, 214963, 407991, 487599, 644889, 951979, 2855937, 6663853, 19991559]

約数ペア:

[(1, 19991559), (3, 6663853), (7, 2855937), (21, 951979), (31, 644889), (41, 487599), (49, 407991), (93, 214963), (107, 186837), (123, 162533), (147, 135997), (217, 92127), (287, 69657), (321, 62279), (651, 30709), (749, 26691), (861, 23219), (1271, 15729), (1519, 13161), (2009, 9951), (2247, 8897), (3317, 6027), (3813, 5243), (4387, 4557)]