21550617

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{67}}^1$

素因数の和:128

約数の個数: 60

約数和(自身を含む): 37618416

約数和(自身を除く): 16067799

約数列:

[1, 3, 9, 11, 19, 27, 33, 57, 67, 81, 99, 171, 201, 209, 297, 361, 513, 603, 627, 737, 891, 1083, 1273, 1539, 1809, 1881, 2211, 3249, 3819, 3971, 5427, 5643, 6633, 9747, 11457, 11913, 14003, 16929, 19899, 24187, 29241, 34371, 35739, 42009, 59697, 72561, 103113, 107217, 126027, 217683, 266057, 321651, 378081, 653049, 798171, 1134243, 1959147, 2394513, 7183539, 21550617]

約数ペア:

[(1, 21550617), (3, 7183539), (9, 2394513), (11, 1959147), (19, 1134243), (27, 798171), (33, 653049), (57, 378081), (67, 321651), (81, 266057), (99, 217683), (171, 126027), (201, 107217), (209, 103113), (297, 72561), (361, 59697), (513, 42009), (603, 35739), (627, 34371), (737, 29241), (891, 24187), (1083, 19899), (1273, 16929), (1539, 14003), (1809, 11913), (1881, 11457), (2211, 9747), (3249, 6633), (3819, 5643), (3971, 5427)]