21131348

素因数分解:

$2^2\times 7^2\times {\mathrm{131}}^1\times {\mathrm{823}}^1$

素因数の和:972

約数の個数: 36

約数和(自身を含む): 43398432

約数和(自身を除く): 22267084

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 131, 196, 262, 524, 823, 917, 1646, 1834, 3292, 3668, 5761, 6419, 11522, 12838, 23044, 25676, 40327, 80654, 107813, 161308, 215626, 431252, 754691, 1509382, 3018764, 5282837, 10565674, 21131348]

約数ペア:

[(1, 21131348), (2, 10565674), (4, 5282837), (7, 3018764), (14, 1509382), (28, 754691), (49, 431252), (98, 215626), (131, 161308), (196, 107813), (262, 80654), (524, 40327), (823, 25676), (917, 23044), (1646, 12838), (1834, 11522), (3292, 6419), (3668, 5761)]