20995912

素因数分解:

$2^3\times 7^2\times {\mathrm{19}}^1\times {\mathrm{2819}}^1$

素因数の和:2858

約数の個数: 48

約数和(自身を含む): 48222000

約数和(自身を除く): 27226088

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 49, 56, 76, 98, 133, 152, 196, 266, 392, 532, 931, 1064, 1862, 2819, 3724, 5638, 7448, 11276, 19733, 22552, 39466, 53561, 78932, 107122, 138131, 157864, 214244, 276262, 374927, 428488, 552524, 749854, 1105048, 1499708, 2624489, 2999416, 5248978, 10497956, 20995912]

約数ペア:

[(1, 20995912), (2, 10497956), (4, 5248978), (7, 2999416), (8, 2624489), (14, 1499708), (19, 1105048), (28, 749854), (38, 552524), (49, 428488), (56, 374927), (76, 276262), (98, 214244), (133, 157864), (152, 138131), (196, 107122), (266, 78932), (392, 53561), (532, 39466), (931, 22552), (1064, 19733), (1862, 11276), (2819, 7448), (3724, 5638)]