20415591

素因数分解:

$3^3\times 7^1\times {\mathrm{109}}^1\times {\mathrm{991}}^1$

素因数の和:1116

約数の個数: 32

約数和(自身を含む): 34918400

約数和(自身を除く): 14502809

約数列:

[1, 3, 7, 9, 21, 27, 63, 109, 189, 327, 763, 981, 991, 2289, 2943, 2973, 6867, 6937, 8919, 20601, 20811, 26757, 62433, 108019, 187299, 324057, 756133, 972171, 2268399, 2916513, 6805197, 20415591]

約数ペア:

[(1, 20415591), (3, 6805197), (7, 2916513), (9, 2268399), (21, 972171), (27, 756133), (63, 324057), (109, 187299), (189, 108019), (327, 62433), (763, 26757), (981, 20811), (991, 20601), (2289, 8919), (2943, 6937), (2973, 6867)]