1278778880

素因数分解:

$2^9\times 5^1\times {\mathrm{499523}}^1$

素因数の和:499546

約数の個数: 40

約数和(自身を含む): 3066078312

約数和(自身を除く): 1787299432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 499523, 999046, 1998092, 2497615, 3996184, 4995230, 7992368, 9990460, 15984736, 19980920, 31969472, 39961840, 63938944, 79923680, 127877888, 159847360, 255755776, 319694720, 639389440, 1278778880]

約数ペア:

[(1, 1278778880), (2, 639389440), (4, 319694720), (5, 255755776), (8, 159847360), (10, 127877888), (16, 79923680), (20, 63938944), (32, 39961840), (40, 31969472), (64, 19980920), (80, 15984736), (128, 9990460), (160, 7992368), (256, 4995230), (320, 3996184), (512, 2497615), (640, 1998092), (1280, 999046), (2560, 499523)]