21415408

素因数分解:

$2^4\times 7^1\times {\mathrm{107}}^1\times {\mathrm{1787}}^1$

素因数の和:1909

約数の個数: 40

約数和(自身を含む): 47889792

約数和(自身を除く): 26474384

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 107, 112, 214, 428, 749, 856, 1498, 1712, 1787, 2996, 3574, 5992, 7148, 11984, 12509, 14296, 25018, 28592, 50036, 100072, 191209, 200144, 382418, 764836, 1338463, 1529672, 2676926, 3059344, 5353852, 10707704, 21415408]

約数ペア:

[(1, 21415408), (2, 10707704), (4, 5353852), (7, 3059344), (8, 2676926), (14, 1529672), (16, 1338463), (28, 764836), (56, 382418), (107, 200144), (112, 191209), (214, 100072), (428, 50036), (749, 28592), (856, 25018), (1498, 14296), (1712, 12509), (1787, 11984), (2996, 7148), (3574, 5992)]