21257055

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{751}}^1$

素因数の和:816

約数の個数: 48

約数和(自身を含む): 40120704

約数和(自身を除く): 18863649

約数列:

[1, 3, 5, 9, 15, 17, 37, 45, 51, 85, 111, 153, 185, 255, 333, 555, 629, 751, 765, 1665, 1887, 2253, 3145, 3755, 5661, 6759, 9435, 11265, 12767, 27787, 28305, 33795, 38301, 63835, 83361, 114903, 138935, 191505, 250083, 416805, 472379, 574515, 1250415, 1417137, 2361895, 4251411, 7085685, 21257055]

約数ペア:

[(1, 21257055), (3, 7085685), (5, 4251411), (9, 2361895), (15, 1417137), (17, 1250415), (37, 574515), (45, 472379), (51, 416805), (85, 250083), (111, 191505), (153, 138935), (185, 114903), (255, 83361), (333, 63835), (555, 38301), (629, 33795), (751, 28305), (765, 27787), (1665, 12767), (1887, 11265), (2253, 9435), (3145, 6759), (3755, 5661)]