21982288

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{359}}^1$

素因数の和:499

約数の個数: 40

約数和(自身を含む): 44193600

約数和(自身を除く): 22211312

約数列:

[1, 2, 4, 8, 16, 43, 86, 89, 172, 178, 344, 356, 359, 688, 712, 718, 1424, 1436, 2872, 3827, 5744, 7654, 15308, 15437, 30616, 30874, 31951, 61232, 61748, 63902, 123496, 127804, 246992, 255608, 511216, 1373893, 2747786, 5495572, 10991144, 21982288]

約数ペア:

[(1, 21982288), (2, 10991144), (4, 5495572), (8, 2747786), (16, 1373893), (43, 511216), (86, 255608), (89, 246992), (172, 127804), (178, 123496), (344, 63902), (356, 61748), (359, 61232), (688, 31951), (712, 30874), (718, 30616), (1424, 15437), (1436, 15308), (2872, 7654), (3827, 5744)]