21276195

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{103}}^1\times {\mathrm{293}}^1$

素因数の和:451

約数の個数: 32

約数和(自身を含む): 35223552

約数和(自身を除く): 13947357

約数列:

[1, 3, 5, 15, 47, 103, 141, 235, 293, 309, 515, 705, 879, 1465, 1545, 4395, 4841, 13771, 14523, 24205, 30179, 41313, 68855, 72615, 90537, 150895, 206565, 452685, 1418413, 4255239, 7092065, 21276195]

約数ペア:

[(1, 21276195), (3, 7092065), (5, 4255239), (15, 1418413), (47, 452685), (103, 206565), (141, 150895), (235, 90537), (293, 72615), (309, 68855), (515, 41313), (705, 30179), (879, 24205), (1465, 14523), (1545, 13771), (4395, 4841)]