20629880

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{131}}^1$

素因数の和:300

約数の個数: 64

約数和(自身を含む): 48660480

約数和(自身を除く): 28030600

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 127, 131, 155, 248, 254, 262, 310, 508, 524, 620, 635, 655, 1016, 1048, 1240, 1270, 1310, 2540, 2620, 3937, 4061, 5080, 5240, 7874, 8122, 15748, 16244, 16637, 19685, 20305, 31496, 32488, 33274, 39370, 40610, 66548, 78740, 81220, 83185, 133096, 157480, 162440, 166370, 332740, 515747, 665480, 1031494, 2062988, 2578735, 4125976, 5157470, 10314940, 20629880]

約数ペア:

[(1, 20629880), (2, 10314940), (4, 5157470), (5, 4125976), (8, 2578735), (10, 2062988), (20, 1031494), (31, 665480), (40, 515747), (62, 332740), (124, 166370), (127, 162440), (131, 157480), (155, 133096), (248, 83185), (254, 81220), (262, 78740), (310, 66548), (508, 40610), (524, 39370), (620, 33274), (635, 32488), (655, 31496), (1016, 20305), (1048, 19685), (1240, 16637), (1270, 16244), (1310, 15748), (2540, 8122), (2620, 7874), (3937, 5240), (4061, 5080)]