21002619

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{41}}^1\times {\mathrm{43}}^1$

素因数の和:136

約数の個数: 48

約数和(自身を含む): 33796224

約数和(自身を除く): 12793605

約数列:

[1, 3, 11, 19, 33, 41, 43, 57, 123, 129, 209, 361, 451, 473, 627, 779, 817, 1083, 1353, 1419, 1763, 2337, 2451, 3971, 5289, 8569, 8987, 11913, 14801, 15523, 19393, 25707, 26961, 33497, 44403, 46569, 58179, 100491, 162811, 170753, 368467, 488433, 512259, 636443, 1105401, 1909329, 7000873, 21002619]

約数ペア:

[(1, 21002619), (3, 7000873), (11, 1909329), (19, 1105401), (33, 636443), (41, 512259), (43, 488433), (57, 368467), (123, 170753), (129, 162811), (209, 100491), (361, 58179), (451, 46569), (473, 44403), (627, 33497), (779, 26961), (817, 25707), (1083, 19393), (1353, 15523), (1419, 14801), (1763, 11913), (2337, 8987), (2451, 8569), (3971, 5289)]