21139551

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{4457}}^1$

素因数の和:4511

約数の個数: 24

約数和(自身を含む): 33381504

約数和(自身を除く): 12241953

約数列:

[1, 3, 9, 17, 31, 51, 93, 153, 279, 527, 1581, 4457, 4743, 13371, 40113, 75769, 138167, 227307, 414501, 681921, 1243503, 2348839, 7046517, 21139551]

約数ペア:

[(1, 21139551), (3, 7046517), (9, 2348839), (17, 1243503), (31, 681921), (51, 414501), (93, 227307), (153, 138167), (279, 75769), (527, 40113), (1581, 13371), (4457, 4743)]