128813120

素因数分解:

$2^6\times 5^1\times {\mathrm{402541}}^1$

素因数の和:402558

約数の個数: 28

約数和(自身を含む): 306737004

約数和(自身を除く): 177923884

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 402541, 805082, 1610164, 2012705, 3220328, 4025410, 6440656, 8050820, 12881312, 16101640, 25762624, 32203280, 64406560, 128813120]

約数ペア:

[(1, 128813120), (2, 64406560), (4, 32203280), (5, 25762624), (8, 16101640), (10, 12881312), (16, 8050820), (20, 6440656), (32, 4025410), (40, 3220328), (64, 2012705), (80, 1610164), (160, 805082), (320, 402541)]