21538557

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{1553}}^1$

素因数の和:1649

約数の個数: 24

約数和(自身を含む): 32969664

約数和(自身を除く): 11431107

約数列:

[1, 3, 9, 23, 67, 69, 201, 207, 603, 1541, 1553, 4623, 4659, 13869, 13977, 35719, 104051, 107157, 312153, 321471, 936459, 2393173, 7179519, 21538557]

約数ペア:

[(1, 21538557), (3, 7179519), (9, 2393173), (23, 936459), (67, 321471), (69, 312153), (201, 107157), (207, 104051), (603, 35719), (1541, 13977), (1553, 13869), (4623, 4659)]