81436340

素因数分解:

$2^2\times 5^1\times {\mathrm{313}}^1\times {\mathrm{13009}}^1$

素因数の和:13331

約数の個数: 24

約数和(自身を含む): 171575880

約数和(自身を除く): 90139540

約数列:

[1, 2, 4, 5, 10, 20, 313, 626, 1252, 1565, 3130, 6260, 13009, 26018, 52036, 65045, 130090, 260180, 4071817, 8143634, 16287268, 20359085, 40718170, 81436340]

約数ペア:

[(1, 81436340), (2, 40718170), (4, 20359085), (5, 16287268), (10, 8143634), (20, 4071817), (313, 260180), (626, 130090), (1252, 65045), (1565, 52036), (3130, 26018), (6260, 13009)]