21724505

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20789}}^1$

素因数の和:20824

約数の個数: 16

約数和(自身を含む): 29937600

約数和(自身を除く): 8213095

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20789, 103945, 228679, 394991, 1143395, 1974955, 4344901, 21724505]

約数ペア:

[(1, 21724505), (5, 4344901), (11, 1974955), (19, 1143395), (55, 394991), (95, 228679), (209, 103945), (1045, 20789)]