21991059

素因数分解:

$3^2\times {\mathrm{23}}^2\times {\mathrm{31}}^1\times {\mathrm{149}}^1$

素因数の和:232

約数の個数: 36

約数和(自身を含む): 34507200

約数和(自身を除く): 12516141

約数列:

[1, 3, 9, 23, 31, 69, 93, 149, 207, 279, 447, 529, 713, 1341, 1587, 2139, 3427, 4619, 4761, 6417, 10281, 13857, 16399, 30843, 41571, 49197, 78821, 106237, 147591, 236463, 318711, 709389, 956133, 2443451, 7330353, 21991059]

約数ペア:

[(1, 21991059), (3, 7330353), (9, 2443451), (23, 956133), (31, 709389), (69, 318711), (93, 236463), (149, 147591), (207, 106237), (279, 78821), (447, 49197), (529, 41571), (713, 30843), (1341, 16399), (1587, 13857), (2139, 10281), (3427, 6417), (4619, 4761)]