81381645

素因数分解:

$3^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{2857}}^1$

素因数の和:3082

約数の個数: 32

約数和(自身を含む): 145415040

約数和(自身を除く): 64033395

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 211, 633, 1055, 1899, 2857, 3165, 5697, 8571, 9495, 14285, 25713, 28485, 42855, 77139, 128565, 385695, 602827, 1808481, 3014135, 5425443, 9042405, 16276329, 27127215, 81381645]

約数ペア:

[(1, 81381645), (3, 27127215), (5, 16276329), (9, 9042405), (15, 5425443), (27, 3014135), (45, 1808481), (135, 602827), (211, 385695), (633, 128565), (1055, 77139), (1899, 42855), (2857, 28485), (3165, 25713), (5697, 14285), (8571, 9495)]