81241280

素因数分解:

$2^6\times 5^1\times {\mathrm{253879}}^1$

素因数の和:253896

約数の個数: 28

約数和(自身を含む): 193456560

約数和(自身を除く): 112215280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 253879, 507758, 1015516, 1269395, 2031032, 2538790, 4062064, 5077580, 8124128, 10155160, 16248256, 20310320, 40620640, 81241280]

約数ペア:

[(1, 81241280), (2, 40620640), (4, 20310320), (5, 16248256), (8, 10155160), (10, 8124128), (16, 5077580), (20, 4062064), (32, 2538790), (40, 2031032), (64, 1269395), (80, 1015516), (160, 507758), (320, 253879)]