20408416

素因数分解:

$2^5\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2939}}^1$

素因数の和:2987

約数の個数: 48

約数和(自身を含む): 47416320

約数和(自身を除く): 27007904

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 31, 32, 56, 62, 112, 124, 217, 224, 248, 434, 496, 868, 992, 1736, 2939, 3472, 5878, 6944, 11756, 20573, 23512, 41146, 47024, 82292, 91109, 94048, 164584, 182218, 329168, 364436, 637763, 658336, 728872, 1275526, 1457744, 2551052, 2915488, 5102104, 10204208, 20408416]

約数ペア:

[(1, 20408416), (2, 10204208), (4, 5102104), (7, 2915488), (8, 2551052), (14, 1457744), (16, 1275526), (28, 728872), (31, 658336), (32, 637763), (56, 364436), (62, 329168), (112, 182218), (124, 164584), (217, 94048), (224, 91109), (248, 82292), (434, 47024), (496, 41146), (868, 23512), (992, 20573), (1736, 11756), (2939, 6944), (3472, 5878)]