21998385

素因数分解:

$3^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{1873}}^1$

素因数の和:1919

約数の個数: 40

約数和(自身を含む): 40815720

約数和(自身を除く): 18817335

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 81, 87, 135, 145, 261, 405, 435, 783, 1305, 1873, 2349, 3915, 5619, 9365, 11745, 16857, 28095, 50571, 54317, 84285, 151713, 162951, 252855, 271585, 488853, 758565, 814755, 1466559, 2444265, 4399677, 7332795, 21998385]

約数ペア:

[(1, 21998385), (3, 7332795), (5, 4399677), (9, 2444265), (15, 1466559), (27, 814755), (29, 758565), (45, 488853), (81, 271585), (87, 252855), (135, 162951), (145, 151713), (261, 84285), (405, 54317), (435, 50571), (783, 28095), (1305, 16857), (1873, 11745), (2349, 9365), (3915, 5619)]