19909285

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{11677}}^1$

素因数の和:11724

約数の個数: 16

約数和(自身を含む): 26906112

約数和(自身を除く): 6996827

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 11677, 58385, 128447, 361987, 642235, 1809935, 3981857, 19909285]

約数ペア:

[(1, 19909285), (5, 3981857), (11, 1809935), (31, 642235), (55, 361987), (155, 128447), (341, 58385), (1705, 11677)]