209568560

素因数分解:

$2^4\times 5^1\times {\mathrm{131}}^1\times {\mathrm{19997}}^1$

素因数の和:20141

約数の個数: 40

約数和(自身を含む): 490990896

約数和(自身を除く): 281422336

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 131, 262, 524, 655, 1048, 1310, 2096, 2620, 5240, 10480, 19997, 39994, 79988, 99985, 159976, 199970, 319952, 399940, 799880, 1599760, 2619607, 5239214, 10478428, 13098035, 20956856, 26196070, 41913712, 52392140, 104784280, 209568560]

約数ペア:

[(1, 209568560), (2, 104784280), (4, 52392140), (5, 41913712), (8, 26196070), (10, 20956856), (16, 13098035), (20, 10478428), (40, 5239214), (80, 2619607), (131, 1599760), (262, 799880), (524, 399940), (655, 319952), (1048, 199970), (1310, 159976), (2096, 99985), (2620, 79988), (5240, 39994), (10480, 19997)]