21037653

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1511}}^1$

素因数の和:1554

約数の個数: 48

約数和(自身を含む): 39626496

約数和(自身を除く): 18588843

約数列:

[1, 3, 7, 9, 13, 17, 21, 39, 51, 63, 91, 117, 119, 153, 221, 273, 357, 663, 819, 1071, 1511, 1547, 1989, 4533, 4641, 10577, 13599, 13923, 19643, 25687, 31731, 58929, 77061, 95193, 137501, 176787, 179809, 231183, 333931, 412503, 539427, 1001793, 1237509, 1618281, 2337517, 3005379, 7012551, 21037653]

約数ペア:

[(1, 21037653), (3, 7012551), (7, 3005379), (9, 2337517), (13, 1618281), (17, 1237509), (21, 1001793), (39, 539427), (51, 412503), (63, 333931), (91, 231183), (117, 179809), (119, 176787), (153, 137501), (221, 95193), (273, 77061), (357, 58929), (663, 31731), (819, 25687), (1071, 19643), (1511, 13923), (1547, 13599), (1989, 10577), (4533, 4641)]