21939788

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{47}}^2\times {\mathrm{191}}^1$

素因数の和:302

約数の個数: 36

約数和(自身を含む): 42467712

約数和(自身を除く): 20527924

約数列:

[1, 2, 4, 13, 26, 47, 52, 94, 188, 191, 382, 611, 764, 1222, 2209, 2444, 2483, 4418, 4966, 8836, 8977, 9932, 17954, 28717, 35908, 57434, 114868, 116701, 233402, 421919, 466804, 843838, 1687676, 5484947, 10969894, 21939788]

約数ペア:

[(1, 21939788), (2, 10969894), (4, 5484947), (13, 1687676), (26, 843838), (47, 466804), (52, 421919), (94, 233402), (188, 116701), (191, 114868), (382, 57434), (611, 35908), (764, 28717), (1222, 17954), (2209, 9932), (2444, 8977), (2483, 8836), (4418, 4966)]