21195688

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{64621}}^1$

素因数の和:64668

約数の個数: 16

約数和(自身を含む): 40711860

約数和(自身を除く): 19516172

約数列:

[1, 2, 4, 8, 41, 82, 164, 328, 64621, 129242, 258484, 516968, 2649461, 5298922, 10597844, 21195688]

約数ペア:

[(1, 21195688), (2, 10597844), (4, 5298922), (8, 2649461), (41, 516968), (82, 258484), (164, 129242), (328, 64621)]