19801280

素因数分解:

$2^6\times 5^1\times {\mathrm{61879}}^1$

素因数の和:61896

約数の個数: 28

約数和(自身を含む): 47152560

約数和(自身を除く): 27351280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 61879, 123758, 247516, 309395, 495032, 618790, 990064, 1237580, 1980128, 2475160, 3960256, 4950320, 9900640, 19801280]

約数ペア:

[(1, 19801280), (2, 9900640), (4, 4950320), (5, 3960256), (8, 2475160), (10, 1980128), (16, 1237580), (20, 990064), (32, 618790), (40, 495032), (64, 309395), (80, 247516), (160, 123758), (320, 61879)]