21017128

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{241}}^1\times {\mathrm{991}}^1$

素因数の和:1249

約数の個数: 32

約数和(自身を含む): 43211520

約数和(自身を除く): 22194392

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 241, 482, 964, 991, 1928, 1982, 2651, 3964, 5302, 7928, 10604, 10901, 21208, 21802, 43604, 87208, 238831, 477662, 955324, 1910648, 2627141, 5254282, 10508564, 21017128]

約数ペア:

[(1, 21017128), (2, 10508564), (4, 5254282), (8, 2627141), (11, 1910648), (22, 955324), (44, 477662), (88, 238831), (241, 87208), (482, 43604), (964, 21802), (991, 21208), (1928, 10901), (1982, 10604), (2651, 7928), (3964, 5302)]