21606400

素因数分解:

$2^{12}\times 5^2\times {\mathrm{211}}^1$

素因数の和:245

約数の個数: 78

約数和(自身を含む): 53831252

約数和(自身を除く): 32224852

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 211, 256, 320, 400, 422, 512, 640, 800, 844, 1024, 1055, 1280, 1600, 1688, 2048, 2110, 2560, 3200, 3376, 4096, 4220, 5120, 5275, 6400, 6752, 8440, 10240, 10550, 12800, 13504, 16880, 20480, 21100, 25600, 27008, 33760, 42200, 51200, 54016, 67520, 84400, 102400, 108032, 135040, 168800, 216064, 270080, 337600, 432128, 540160, 675200, 864256, 1080320, 1350400, 2160640, 2700800, 4321280, 5401600, 10803200, 21606400]

約数ペア:

[(1, 21606400), (2, 10803200), (4, 5401600), (5, 4321280), (8, 2700800), (10, 2160640), (16, 1350400), (20, 1080320), (25, 864256), (32, 675200), (40, 540160), (50, 432128), (64, 337600), (80, 270080), (100, 216064), (128, 168800), (160, 135040), (200, 108032), (211, 102400), (256, 84400), (320, 67520), (400, 54016), (422, 51200), (512, 42200), (640, 33760), (800, 27008), (844, 25600), (1024, 21100), (1055, 20480), (1280, 16880), (1600, 13504), (1688, 12800), (2048, 10550), (2110, 10240), (2560, 8440), (3200, 6752), (3376, 6400), (4096, 5275), (4220, 5120)]