81838160

素因数分解:

$2^4\times 5^1\times {\mathrm{1022977}}^1$

素因数の和:1022990

約数の個数: 20

約数和(自身を含む): 190273908

約数和(自身を除く): 108435748

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1022977, 2045954, 4091908, 5114885, 8183816, 10229770, 16367632, 20459540, 40919080, 81838160]

約数ペア:

[(1, 81838160), (2, 40919080), (4, 20459540), (5, 16367632), (8, 10229770), (10, 8183816), (16, 5114885), (20, 4091908), (40, 2045954), (80, 1022977)]