19809765

素因数分解:

$3^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1193}}^1$

素因数の和:1251

約数の個数: 40

約数和(自身を含む): 36407448

約数和(自身を除く): 16597683

約数列:

[1, 3, 5, 9, 15, 27, 41, 45, 81, 123, 135, 205, 369, 405, 615, 1107, 1193, 1845, 3321, 3579, 5535, 5965, 10737, 16605, 17895, 32211, 48913, 53685, 96633, 146739, 161055, 244565, 440217, 483165, 733695, 1320651, 2201085, 3961953, 6603255, 19809765]

約数ペア:

[(1, 19809765), (3, 6603255), (5, 3961953), (9, 2201085), (15, 1320651), (27, 733695), (41, 483165), (45, 440217), (81, 244565), (123, 161055), (135, 146739), (205, 96633), (369, 53685), (405, 48913), (615, 32211), (1107, 17895), (1193, 16605), (1845, 10737), (3321, 5965), (3579, 5535)]