21567812

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{571}}^1$

素因数の和:672

約数の個数: 48

約数和(自身を含む): 46126080

約数和(自身を除く): 24558268

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 71, 76, 133, 142, 266, 284, 497, 532, 571, 994, 1142, 1349, 1988, 2284, 2698, 3997, 5396, 7994, 9443, 10849, 15988, 18886, 21698, 37772, 40541, 43396, 75943, 81082, 151886, 162164, 283787, 303772, 567574, 770279, 1135148, 1540558, 3081116, 5391953, 10783906, 21567812]

約数ペア:

[(1, 21567812), (2, 10783906), (4, 5391953), (7, 3081116), (14, 1540558), (19, 1135148), (28, 770279), (38, 567574), (71, 303772), (76, 283787), (133, 162164), (142, 151886), (266, 81082), (284, 75943), (497, 43396), (532, 40541), (571, 37772), (994, 21698), (1142, 18886), (1349, 15988), (1988, 10849), (2284, 9443), (2698, 7994), (3997, 5396)]