728385

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{991}}^1$

素因数の和:1013

約数の個数: 24

約数和(自身を含む): 1357056

約数和(自身を除く): 628671

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735, 991, 2973, 4955, 6937, 14865, 20811, 34685, 48559, 104055, 145677, 242795, 728385]

約数ペア:

[(1, 728385), (3, 242795), (5, 145677), (7, 104055), (15, 48559), (21, 34685), (35, 20811), (49, 14865), (105, 6937), (147, 4955), (245, 2973), (735, 991)]