21747596

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{607}}^1$

素因数の和:690

約数の個数: 36

約数和(自身を含む): 42057792

約数和(自身を除く): 20310196

約数列:

[1, 2, 4, 13, 26, 52, 53, 106, 169, 212, 338, 607, 676, 689, 1214, 1378, 2428, 2756, 7891, 8957, 15782, 17914, 31564, 32171, 35828, 64342, 102583, 128684, 205166, 410332, 418223, 836446, 1672892, 5436899, 10873798, 21747596]

約数ペア:

[(1, 21747596), (2, 10873798), (4, 5436899), (13, 1672892), (26, 836446), (52, 418223), (53, 410332), (106, 205166), (169, 128684), (212, 102583), (338, 64342), (607, 35828), (676, 32171), (689, 31564), (1214, 17914), (1378, 15782), (2428, 8957), (2756, 7891)]