21041937

素因数分解:

$3^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1$

素因数の和:132

約数の個数: 80

約数和(自身を含む): 39726720

約数和(自身を除く): 18684783

約数列:

[1, 3, 7, 9, 17, 21, 27, 37, 51, 59, 63, 81, 111, 119, 153, 177, 189, 259, 333, 357, 413, 459, 531, 567, 629, 777, 999, 1003, 1071, 1239, 1377, 1593, 1887, 2183, 2331, 2997, 3009, 3213, 3717, 4403, 4779, 5661, 6549, 6993, 7021, 9027, 9639, 11151, 13209, 15281, 16983, 19647, 20979, 21063, 27081, 33453, 37111, 39627, 45843, 50949, 58941, 63189, 81243, 111333, 118881, 137529, 176823, 189567, 259777, 333999, 356643, 412587, 568701, 779331, 1001997, 1237761, 2337993, 3005991, 7013979, 21041937]

約数ペア:

[(1, 21041937), (3, 7013979), (7, 3005991), (9, 2337993), (17, 1237761), (21, 1001997), (27, 779331), (37, 568701), (51, 412587), (59, 356643), (63, 333999), (81, 259777), (111, 189567), (119, 176823), (153, 137529), (177, 118881), (189, 111333), (259, 81243), (333, 63189), (357, 58941), (413, 50949), (459, 45843), (531, 39627), (567, 37111), (629, 33453), (777, 27081), (999, 21063), (1003, 20979), (1071, 19647), (1239, 16983), (1377, 15281), (1593, 13209), (1887, 11151), (2183, 9639), (2331, 9027), (2997, 7021), (3009, 6993), (3213, 6549), (3717, 5661), (4403, 4779)]