21387234

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^2\times {\mathrm{89}}^1\times {\mathrm{331}}^1$

素因数の和:447

約数の個数: 48

約数和(自身を含む): 47688480

約数和(自身を除く): 26301246

約数列:

[1, 2, 3, 6, 11, 22, 33, 66, 89, 121, 178, 242, 267, 331, 363, 534, 662, 726, 979, 993, 1958, 1986, 2937, 3641, 5874, 7282, 10769, 10923, 21538, 21846, 29459, 32307, 40051, 58918, 64614, 80102, 88377, 120153, 176754, 240306, 324049, 648098, 972147, 1944294, 3564539, 7129078, 10693617, 21387234]

約数ペア:

[(1, 21387234), (2, 10693617), (3, 7129078), (6, 3564539), (11, 1944294), (22, 972147), (33, 648098), (66, 324049), (89, 240306), (121, 176754), (178, 120153), (242, 88377), (267, 80102), (331, 64614), (363, 58918), (534, 40051), (662, 32307), (726, 29459), (979, 21846), (993, 21538), (1958, 10923), (1986, 10769), (2937, 7282), (3641, 5874)]