18987825

素因数分解:

$3^1\times 5^2\times {\mathrm{409}}^1\times {\mathrm{619}}^1$

素因数の和:1041

約数の個数: 24

約数和(自身を含む): 31520800

約数和(自身を除く): 12532975

約数列:

[1, 3, 5, 15, 25, 75, 409, 619, 1227, 1857, 2045, 3095, 6135, 9285, 10225, 15475, 30675, 46425, 253171, 759513, 1265855, 3797565, 6329275, 18987825]

約数ペア:

[(1, 18987825), (3, 6329275), (5, 3797565), (15, 1265855), (25, 759513), (75, 253171), (409, 46425), (619, 30675), (1227, 15475), (1857, 10225), (2045, 9285), (3095, 6135)]