21666141

素因数分解:

$3^2\times 7^1\times {\mathrm{241}}^1\times {\mathrm{1427}}^1$

素因数の和:1681

約数の個数: 24

約数和(自身を含む): 35939904

約数和(自身を除く): 14273763

約数列:

[1, 3, 7, 9, 21, 63, 241, 723, 1427, 1687, 2169, 4281, 5061, 9989, 12843, 15183, 29967, 89901, 343907, 1031721, 2407349, 3095163, 7222047, 21666141]

約数ペア:

[(1, 21666141), (3, 7222047), (7, 3095163), (9, 2407349), (21, 1031721), (63, 343907), (241, 89901), (723, 29967), (1427, 15183), (1687, 12843), (2169, 9989), (4281, 5061)]