20121976

素因数分解:

$2^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{173}}^1$

素因数の和:284

約数の個数: 64

約数和(自身を含む): 45434880

約数和(自身を除く): 25312904

約数列:

[1, 2, 4, 7, 8, 14, 28, 31, 56, 62, 67, 124, 134, 173, 217, 248, 268, 346, 434, 469, 536, 692, 868, 938, 1211, 1384, 1736, 1876, 2077, 2422, 3752, 4154, 4844, 5363, 8308, 9688, 10726, 11591, 14539, 16616, 21452, 23182, 29078, 37541, 42904, 46364, 58156, 75082, 81137, 92728, 116312, 150164, 162274, 300328, 324548, 359321, 649096, 718642, 1437284, 2515247, 2874568, 5030494, 10060988, 20121976]

約数ペア:

[(1, 20121976), (2, 10060988), (4, 5030494), (7, 2874568), (8, 2515247), (14, 1437284), (28, 718642), (31, 649096), (56, 359321), (62, 324548), (67, 300328), (124, 162274), (134, 150164), (173, 116312), (217, 92728), (248, 81137), (268, 75082), (346, 58156), (434, 46364), (469, 42904), (536, 37541), (692, 29078), (868, 23182), (938, 21452), (1211, 16616), (1384, 14539), (1736, 11591), (1876, 10726), (2077, 9688), (2422, 8308), (3752, 5363), (4154, 4844)]