21256695

素因数分解:

$3^3\times 5^1\times {\mathrm{157457}}^1$

素因数の和:157471

約数の個数: 16

約数和(自身を含む): 37789920

約数和(自身を除く): 16533225

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 157457, 472371, 787285, 1417113, 2361855, 4251339, 7085565, 21256695]

約数ペア:

[(1, 21256695), (3, 7085565), (5, 4251339), (9, 2361855), (15, 1417113), (27, 787285), (45, 472371), (135, 157457)]