79999840

素因数分解:

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

素因数の和:300

約数の個数: 72

約数和(自身を含む): 196644672

約数和(自身を除く): 116644832

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 127, 155, 160, 248, 254, 310, 496, 508, 620, 635, 992, 1016, 1240, 1270, 2032, 2480, 2540, 3937, 4064, 4960, 5080, 7874, 10160, 15748, 16129, 19685, 20320, 31496, 32258, 39370, 62992, 64516, 78740, 80645, 125984, 129032, 157480, 161290, 258064, 314960, 322580, 499999, 516128, 629920, 645160, 999998, 1290320, 1999996, 2499995, 2580640, 3999992, 4999990, 7999984, 9999980, 15999968, 19999960, 39999920, 79999840]

約数ペア:

[(1, 79999840), (2, 39999920), (4, 19999960), (5, 15999968), (8, 9999980), (10, 7999984), (16, 4999990), (20, 3999992), (31, 2580640), (32, 2499995), (40, 1999996), (62, 1290320), (80, 999998), (124, 645160), (127, 629920), (155, 516128), (160, 499999), (248, 322580), (254, 314960), (310, 258064), (496, 161290), (508, 157480), (620, 129032), (635, 125984), (992, 80645), (1016, 78740), (1240, 64516), (1270, 62992), (2032, 39370), (2480, 32258), (2540, 31496), (3937, 20320), (4064, 19685), (4960, 16129), (5080, 15748), (7874, 10160)]