21497571

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{149}}^1$

素因数の和:236

約数の個数: 48

約数和(自身を含む): 35380800

約数和(自身を除く): 13883229

約数列:

[1, 3, 9, 17, 23, 41, 51, 69, 123, 149, 153, 207, 369, 391, 447, 697, 943, 1173, 1341, 2091, 2533, 2829, 3427, 3519, 6109, 6273, 7599, 8487, 10281, 16031, 18327, 22797, 30843, 48093, 54981, 58259, 103853, 140507, 144279, 174777, 311559, 421521, 524331, 934677, 1264563, 2388619, 7165857, 21497571]

約数ペア:

[(1, 21497571), (3, 7165857), (9, 2388619), (17, 1264563), (23, 934677), (41, 524331), (51, 421521), (69, 311559), (123, 174777), (149, 144279), (153, 140507), (207, 103853), (369, 58259), (391, 54981), (447, 48093), (697, 30843), (943, 22797), (1173, 18327), (1341, 16031), (2091, 10281), (2533, 8487), (2829, 7599), (3427, 6273), (3519, 6109)]