21203925

素因数分解:

$3^1\times 5^2\times {\mathrm{269}}^1\times {\mathrm{1051}}^1$

素因数の和:1333

約数の個数: 24

約数和(自身を含む): 35220960

約数和(自身を除く): 14017035

約数列:

[1, 3, 5, 15, 25, 75, 269, 807, 1051, 1345, 3153, 4035, 5255, 6725, 15765, 20175, 26275, 78825, 282719, 848157, 1413595, 4240785, 7067975, 21203925]

約数ペア:

[(1, 21203925), (3, 7067975), (5, 4240785), (15, 1413595), (25, 848157), (75, 282719), (269, 78825), (807, 26275), (1051, 20175), (1345, 15765), (3153, 6725), (4035, 5255)]