81218860

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{238879}}^1$

素因数の和:238905

約数の個数: 24

約数和(自身を含む): 180593280

約数和(自身を除く): 99374420

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 238879, 477758, 955516, 1194395, 2388790, 4060943, 4777580, 8121886, 16243772, 20304715, 40609430, 81218860]

約数ペア:

[(1, 81218860), (2, 40609430), (4, 20304715), (5, 16243772), (10, 8121886), (17, 4777580), (20, 4060943), (34, 2388790), (68, 1194395), (85, 955516), (170, 477758), (340, 238879)]