21002128

素因数分解:

$2^4\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{263}}^1$

素因数の和:332

約数の個数: 80

約数和(自身を含む): 50282496

約数和(自身を除く): 29280368

約数列:

[1, 2, 4, 7, 8, 14, 16, 23, 28, 31, 46, 56, 62, 92, 112, 124, 161, 184, 217, 248, 263, 322, 368, 434, 496, 526, 644, 713, 868, 1052, 1288, 1426, 1736, 1841, 2104, 2576, 2852, 3472, 3682, 4208, 4991, 5704, 6049, 7364, 8153, 9982, 11408, 12098, 14728, 16306, 19964, 24196, 29456, 32612, 39928, 42343, 48392, 57071, 65224, 79856, 84686, 96784, 114142, 130448, 169372, 187519, 228284, 338744, 375038, 456568, 677488, 750076, 913136, 1312633, 1500152, 2625266, 3000304, 5250532, 10501064, 21002128]

約数ペア:

[(1, 21002128), (2, 10501064), (4, 5250532), (7, 3000304), (8, 2625266), (14, 1500152), (16, 1312633), (23, 913136), (28, 750076), (31, 677488), (46, 456568), (56, 375038), (62, 338744), (92, 228284), (112, 187519), (124, 169372), (161, 130448), (184, 114142), (217, 96784), (248, 84686), (263, 79856), (322, 65224), (368, 57071), (434, 48392), (496, 42343), (526, 39928), (644, 32612), (713, 29456), (868, 24196), (1052, 19964), (1288, 16306), (1426, 14728), (1736, 12098), (1841, 11408), (2104, 9982), (2576, 8153), (2852, 7364), (3472, 6049), (3682, 5704), (4208, 4991)]