21478400

素因数分解:

$2^{10}\times 5^2\times {\mathrm{839}}^1$

素因数の和:869

約数の個数: 66

約数和(自身を含む): 53303880

約数和(自身を除く): 31825480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 512, 640, 800, 839, 1024, 1280, 1600, 1678, 2560, 3200, 3356, 4195, 5120, 6400, 6712, 8390, 12800, 13424, 16780, 20975, 25600, 26848, 33560, 41950, 53696, 67120, 83900, 107392, 134240, 167800, 214784, 268480, 335600, 429568, 536960, 671200, 859136, 1073920, 1342400, 2147840, 2684800, 4295680, 5369600, 10739200, 21478400]

約数ペア:

[(1, 21478400), (2, 10739200), (4, 5369600), (5, 4295680), (8, 2684800), (10, 2147840), (16, 1342400), (20, 1073920), (25, 859136), (32, 671200), (40, 536960), (50, 429568), (64, 335600), (80, 268480), (100, 214784), (128, 167800), (160, 134240), (200, 107392), (256, 83900), (320, 67120), (400, 53696), (512, 41950), (640, 33560), (800, 26848), (839, 25600), (1024, 20975), (1280, 16780), (1600, 13424), (1678, 12800), (2560, 8390), (3200, 6712), (3356, 6400), (4195, 5120)]