21351184

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{78497}}^1$

素因数の和:78522

約数の個数: 20

約数和(自身を含む): 43801884

約数和(自身を除く): 22450700

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 78497, 156994, 313988, 627976, 1255952, 1334449, 2668898, 5337796, 10675592, 21351184]

約数ペア:

[(1, 21351184), (2, 10675592), (4, 5337796), (8, 2668898), (16, 1334449), (17, 1255952), (34, 627976), (68, 313988), (136, 156994), (272, 78497)]