21004809

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{3461}}^1$

素因数の和:3505

約数の個数: 24

約数和(自身を含む): 34010688

約数和(自身を除く): 13005879

約数列:

[1, 3, 7, 17, 21, 51, 119, 289, 357, 867, 2023, 3461, 6069, 10383, 24227, 58837, 72681, 176511, 411859, 1000229, 1235577, 3000687, 7001603, 21004809]

約数ペア:

[(1, 21004809), (3, 7001603), (7, 3000687), (17, 1235577), (21, 1000229), (51, 411859), (119, 176511), (289, 72681), (357, 58837), (867, 24227), (2023, 10383), (3461, 6069)]