21132800

素因数分解:

$2^9\times 5^2\times {\mathrm{13}}^1\times {\mathrm{127}}^1$

素因数の和:168

約数の個数: 120

約数和(自身を含む): 56829696

約数和(自身を除く): 35696896

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 64, 65, 80, 100, 104, 127, 128, 130, 160, 200, 208, 254, 256, 260, 320, 325, 400, 416, 508, 512, 520, 635, 640, 650, 800, 832, 1016, 1040, 1270, 1280, 1300, 1600, 1651, 1664, 2032, 2080, 2540, 2560, 2600, 3175, 3200, 3302, 3328, 4064, 4160, 5080, 5200, 6350, 6400, 6604, 6656, 8128, 8255, 8320, 10160, 10400, 12700, 12800, 13208, 16256, 16510, 16640, 20320, 20800, 25400, 26416, 32512, 33020, 33280, 40640, 41275, 41600, 50800, 52832, 65024, 66040, 81280, 82550, 83200, 101600, 105664, 132080, 162560, 165100, 166400, 203200, 211328, 264160, 325120, 330200, 406400, 422656, 528320, 660400, 812800, 845312, 1056640, 1320800, 1625600, 2113280, 2641600, 4226560, 5283200, 10566400, 21132800]

約数ペア:

[(1, 21132800), (2, 10566400), (4, 5283200), (5, 4226560), (8, 2641600), (10, 2113280), (13, 1625600), (16, 1320800), (20, 1056640), (25, 845312), (26, 812800), (32, 660400), (40, 528320), (50, 422656), (52, 406400), (64, 330200), (65, 325120), (80, 264160), (100, 211328), (104, 203200), (127, 166400), (128, 165100), (130, 162560), (160, 132080), (200, 105664), (208, 101600), (254, 83200), (256, 82550), (260, 81280), (320, 66040), (325, 65024), (400, 52832), (416, 50800), (508, 41600), (512, 41275), (520, 40640), (635, 33280), (640, 33020), (650, 32512), (800, 26416), (832, 25400), (1016, 20800), (1040, 20320), (1270, 16640), (1280, 16510), (1300, 16256), (1600, 13208), (1651, 12800), (1664, 12700), (2032, 10400), (2080, 10160), (2540, 8320), (2560, 8255), (2600, 8128), (3175, 6656), (3200, 6604), (3302, 6400), (3328, 6350), (4064, 5200), (4160, 5080)]