20942515

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{173}}^1$

素因数の和:291

約数の個数: 32

約数和(自身を含む): 28864512

約数和(自身を除く): 7921997

約数列:

[1, 5, 11, 31, 55, 71, 155, 173, 341, 355, 781, 865, 1705, 1903, 2201, 3905, 5363, 9515, 11005, 12283, 24211, 26815, 58993, 61415, 121055, 135113, 294965, 380773, 675565, 1903865, 4188503, 20942515]

約数ペア:

[(1, 20942515), (5, 4188503), (11, 1903865), (31, 675565), (55, 380773), (71, 294965), (155, 135113), (173, 121055), (341, 61415), (355, 58993), (781, 26815), (865, 24211), (1705, 12283), (1903, 11005), (2201, 9515), (3905, 5363)]