21286400

素因数分解:

$2^9\times 5^2\times {\mathrm{1663}}^1$

素因数の和:1691

約数の個数: 60

約数和(自身を含む): 52770432

約数和(自身を除く): 31484032

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, 1280, 1600, 1663, 2560, 3200, 3326, 6400, 6652, 8315, 12800, 13304, 16630, 26608, 33260, 41575, 53216, 66520, 83150, 106432, 133040, 166300, 212864, 266080, 332600, 425728, 532160, 665200, 851456, 1064320, 1330400, 2128640, 2660800, 4257280, 5321600, 10643200, 21286400]

約数ペア:

[(1, 21286400), (2, 10643200), (4, 5321600), (5, 4257280), (8, 2660800), (10, 2128640), (16, 1330400), (20, 1064320), (25, 851456), (32, 665200), (40, 532160), (50, 425728), (64, 332600), (80, 266080), (100, 212864), (128, 166300), (160, 133040), (200, 106432), (256, 83150), (320, 66520), (400, 53216), (512, 41575), (640, 33260), (800, 26608), (1280, 16630), (1600, 13304), (1663, 12800), (2560, 8315), (3200, 6652), (3326, 6400)]