261233920

素因数分解:

$2^8\times 5^1\times {\mathrm{127}}^1\times {\mathrm{1607}}^1$

素因数の和:1755

約数の個数: 72

約数和(自身を含む): 631056384

約数和(自身を除く): 369822464

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 128, 160, 254, 256, 320, 508, 635, 640, 1016, 1270, 1280, 1607, 2032, 2540, 3214, 4064, 5080, 6428, 8035, 8128, 10160, 12856, 16070, 16256, 20320, 25712, 32140, 32512, 40640, 51424, 64280, 81280, 102848, 128560, 162560, 204089, 205696, 257120, 408178, 411392, 514240, 816356, 1020445, 1028480, 1632712, 2040890, 2056960, 3265424, 4081780, 6530848, 8163560, 13061696, 16327120, 26123392, 32654240, 52246784, 65308480, 130616960, 261233920]

約数ペア:

[(1, 261233920), (2, 130616960), (4, 65308480), (5, 52246784), (8, 32654240), (10, 26123392), (16, 16327120), (20, 13061696), (32, 8163560), (40, 6530848), (64, 4081780), (80, 3265424), (127, 2056960), (128, 2040890), (160, 1632712), (254, 1028480), (256, 1020445), (320, 816356), (508, 514240), (635, 411392), (640, 408178), (1016, 257120), (1270, 205696), (1280, 204089), (1607, 162560), (2032, 128560), (2540, 102848), (3214, 81280), (4064, 64280), (5080, 51424), (6428, 40640), (8035, 32512), (8128, 32140), (10160, 25712), (12856, 20320), (16070, 16256)]