21758055

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{163}}^1\times {\mathrm{809}}^1$

素因数の和:991

約数の個数: 32

約数和(自身を含む): 38257920

約数和(自身を除く): 16499865

約数列:

[1, 3, 5, 11, 15, 33, 55, 163, 165, 489, 809, 815, 1793, 2427, 2445, 4045, 5379, 8899, 8965, 12135, 26697, 26895, 44495, 131867, 133485, 395601, 659335, 1450537, 1978005, 4351611, 7252685, 21758055]

約数ペア:

[(1, 21758055), (3, 7252685), (5, 4351611), (11, 1978005), (15, 1450537), (33, 659335), (55, 395601), (163, 133485), (165, 131867), (489, 44495), (809, 26895), (815, 26697), (1793, 12135), (2427, 8965), (2445, 8899), (4045, 5379)]