20887240

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1283}}^1$

素因数の和:1342

約数の個数: 64

約数和(自身を含む): 52695360

約数和(自身を除く): 31808120

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 37, 40, 44, 55, 74, 88, 110, 148, 185, 220, 296, 370, 407, 440, 740, 814, 1283, 1480, 1628, 2035, 2566, 3256, 4070, 5132, 6415, 8140, 10264, 12830, 14113, 16280, 25660, 28226, 47471, 51320, 56452, 70565, 94942, 112904, 141130, 189884, 237355, 282260, 379768, 474710, 522181, 564520, 949420, 1044362, 1898840, 2088724, 2610905, 4177448, 5221810, 10443620, 20887240]

約数ペア:

[(1, 20887240), (2, 10443620), (4, 5221810), (5, 4177448), (8, 2610905), (10, 2088724), (11, 1898840), (20, 1044362), (22, 949420), (37, 564520), (40, 522181), (44, 474710), (55, 379768), (74, 282260), (88, 237355), (110, 189884), (148, 141130), (185, 112904), (220, 94942), (296, 70565), (370, 56452), (407, 51320), (440, 47471), (740, 28226), (814, 25660), (1283, 16280), (1480, 14113), (1628, 12830), (2035, 10264), (2566, 8140), (3256, 6415), (4070, 5132)]