20471978

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{557}}^1$

素因数の和:646

約数の個数: 32

約数和(自身を含む): 34712064

約数和(自身を除く): 14240086

約数列:

[1, 2, 17, 23, 34, 46, 47, 94, 391, 557, 782, 799, 1081, 1114, 1598, 2162, 9469, 12811, 18377, 18938, 25622, 26179, 36754, 52358, 217787, 435574, 445043, 602117, 890086, 1204234, 10235989, 20471978]

約数ペア:

[(1, 20471978), (2, 10235989), (17, 1204234), (23, 890086), (34, 602117), (46, 445043), (47, 435574), (94, 217787), (391, 52358), (557, 36754), (782, 26179), (799, 25622), (1081, 18938), (1114, 18377), (1598, 12811), (2162, 9469)]