1557777221

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{19699}}^1$

素因数の和:19809

約数の個数: 32

約数和(自身を含む): 2118144000

約数和(自身を除く): 560366779

約数列:

[1, 7, 11, 13, 77, 79, 91, 143, 553, 869, 1001, 1027, 6083, 7189, 11297, 19699, 79079, 137893, 216689, 256087, 1516823, 1556221, 1792609, 2816957, 10893547, 17118431, 19718699, 20230873, 119829017, 141616111, 222539603, 1557777221]

約数ペア:

[(1, 1557777221), (7, 222539603), (11, 141616111), (13, 119829017), (77, 20230873), (79, 19718699), (91, 17118431), (143, 10893547), (553, 2816957), (869, 1792609), (1001, 1556221), (1027, 1516823), (6083, 256087), (7189, 216689), (11297, 137893), (19699, 79079)]