21037755

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{23}}^1\times {\mathrm{211}}^1$

素因数の和:276

約数の個数: 48

約数和(自身を含む): 37488384

約数和(自身を除く): 16450629

約数列:

[1, 3, 5, 15, 17, 23, 51, 69, 85, 115, 211, 255, 289, 345, 391, 633, 867, 1055, 1173, 1445, 1955, 3165, 3587, 4335, 4853, 5865, 6647, 10761, 14559, 17935, 19941, 24265, 33235, 53805, 60979, 72795, 82501, 99705, 182937, 247503, 304895, 412505, 914685, 1237515, 1402517, 4207551, 7012585, 21037755]

約数ペア:

[(1, 21037755), (3, 7012585), (5, 4207551), (15, 1402517), (17, 1237515), (23, 914685), (51, 412505), (69, 304895), (85, 247503), (115, 182937), (211, 99705), (255, 82501), (289, 72795), (345, 60979), (391, 53805), (633, 33235), (867, 24265), (1055, 19941), (1173, 17935), (1445, 14559), (1955, 10761), (3165, 6647), (3587, 5865), (4335, 4853)]