20404815

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{103}}^1\times {\mathrm{281}}^1$

素因数の和:439

約数の個数: 32

約数和(自身を含む): 33785856

約数和(自身を除く): 13381041

約数列:

[1, 3, 5, 15, 47, 103, 141, 235, 281, 309, 515, 705, 843, 1405, 1545, 4215, 4841, 13207, 14523, 24205, 28943, 39621, 66035, 72615, 86829, 144715, 198105, 434145, 1360321, 4080963, 6801605, 20404815]

約数ペア:

[(1, 20404815), (3, 6801605), (5, 4080963), (15, 1360321), (47, 434145), (103, 198105), (141, 144715), (235, 86829), (281, 72615), (309, 66035), (515, 39621), (705, 28943), (843, 24205), (1405, 14523), (1545, 13207), (4215, 4841)]