39999920

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^2$

素因数の和:298

約数の個数: 60

約数和(自身を含む): 96761664

約数和(自身を除く): 56761744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 127, 155, 248, 254, 310, 496, 508, 620, 635, 1016, 1240, 1270, 2032, 2480, 2540, 3937, 5080, 7874, 10160, 15748, 16129, 19685, 31496, 32258, 39370, 62992, 64516, 78740, 80645, 129032, 157480, 161290, 258064, 314960, 322580, 499999, 645160, 999998, 1290320, 1999996, 2499995, 3999992, 4999990, 7999984, 9999980, 19999960, 39999920]

約数ペア:

[(1, 39999920), (2, 19999960), (4, 9999980), (5, 7999984), (8, 4999990), (10, 3999992), (16, 2499995), (20, 1999996), (31, 1290320), (40, 999998), (62, 645160), (80, 499999), (124, 322580), (127, 314960), (155, 258064), (248, 161290), (254, 157480), (310, 129032), (496, 80645), (508, 78740), (620, 64516), (635, 62992), (1016, 39370), (1240, 32258), (1270, 31496), (2032, 19685), (2480, 16129), (2540, 15748), (3937, 10160), (5080, 7874)]