201991988

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{211}}^1\times {\mathrm{21757}}^1$

素因数の和:21983

約数の個数: 24

約数和(自身を含む): 387466464

約数和(自身を除く): 185474476

約数列:

[1, 2, 4, 11, 22, 44, 211, 422, 844, 2321, 4642, 9284, 21757, 43514, 87028, 239327, 478654, 957308, 4590727, 9181454, 18362908, 50497997, 100995994, 201991988]

約数ペア:

[(1, 201991988), (2, 100995994), (4, 50497997), (11, 18362908), (22, 9181454), (44, 4590727), (211, 957308), (422, 478654), (844, 239327), (2321, 87028), (4642, 43514), (9284, 21757)]