1278952960

素因数分解:

$2^9\times 5^1\times {\mathrm{499591}}^1$

素因数の和:499614

約数の個数: 40

約数和(自身を含む): 3066495696

約数和(自身を除く): 1787542736

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 499591, 999182, 1998364, 2497955, 3996728, 4995910, 7993456, 9991820, 15986912, 19983640, 31973824, 39967280, 63947648, 79934560, 127895296, 159869120, 255790592, 319738240, 639476480, 1278952960]

約数ペア:

[(1, 1278952960), (2, 639476480), (4, 319738240), (5, 255790592), (8, 159869120), (10, 127895296), (16, 79934560), (20, 63947648), (32, 39967280), (40, 31973824), (64, 19983640), (80, 15986912), (128, 9991820), (160, 7993456), (256, 4995910), (320, 3996728), (512, 2497955), (640, 1998364), (1280, 999182), (2560, 499591)]