21065499

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{89}}^1$

素因数の和:149

約数の個数: 72

約数和(自身を含む): 40229280

約数和(自身を除く): 19163781

約数列:

[1, 3, 7, 9, 13, 17, 21, 39, 51, 63, 89, 91, 117, 119, 153, 221, 267, 273, 289, 357, 623, 663, 801, 819, 867, 1071, 1157, 1513, 1547, 1869, 1989, 2023, 2601, 3471, 3757, 4539, 4641, 5607, 6069, 8099, 10413, 10591, 11271, 13617, 13923, 18207, 19669, 24297, 25721, 26299, 31773, 33813, 59007, 72891, 77163, 78897, 95319, 137683, 177021, 180047, 231489, 236691, 334373, 413049, 540141, 1003119, 1239147, 1620423, 2340611, 3009357, 7021833, 21065499]

約数ペア:

[(1, 21065499), (3, 7021833), (7, 3009357), (9, 2340611), (13, 1620423), (17, 1239147), (21, 1003119), (39, 540141), (51, 413049), (63, 334373), (89, 236691), (91, 231489), (117, 180047), (119, 177021), (153, 137683), (221, 95319), (267, 78897), (273, 77163), (289, 72891), (357, 59007), (623, 33813), (663, 31773), (801, 26299), (819, 25721), (867, 24297), (1071, 19669), (1157, 18207), (1513, 13923), (1547, 13617), (1869, 11271), (1989, 10591), (2023, 10413), (2601, 8099), (3471, 6069), (3757, 5607), (4539, 4641)]