109999780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{127}}^2$

素因数の和:305

約数の個数: 72

約数和(自身を含む): 262192896

約数和(自身を除く): 152193116

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 31, 44, 55, 62, 110, 124, 127, 155, 220, 254, 310, 341, 508, 620, 635, 682, 1270, 1364, 1397, 1705, 2540, 2794, 3410, 3937, 5588, 6820, 6985, 7874, 13970, 15748, 16129, 19685, 27940, 32258, 39370, 43307, 64516, 78740, 80645, 86614, 161290, 173228, 177419, 216535, 322580, 354838, 433070, 499999, 709676, 866140, 887095, 999998, 1774190, 1999996, 2499995, 3548380, 4999990, 5499989, 9999980, 10999978, 21999956, 27499945, 54999890, 109999780]

約数ペア:

[(1, 109999780), (2, 54999890), (4, 27499945), (5, 21999956), (10, 10999978), (11, 9999980), (20, 5499989), (22, 4999990), (31, 3548380), (44, 2499995), (55, 1999996), (62, 1774190), (110, 999998), (124, 887095), (127, 866140), (155, 709676), (220, 499999), (254, 433070), (310, 354838), (341, 322580), (508, 216535), (620, 177419), (635, 173228), (682, 161290), (1270, 86614), (1364, 80645), (1397, 78740), (1705, 64516), (2540, 43307), (2794, 39370), (3410, 32258), (3937, 27940), (5588, 19685), (6820, 16129), (6985, 15748), (7874, 13970)]