20890779

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{1297}}^1$

素因数の和:1379

約数の個数: 32

約数和(自身を含む): 34890240

約数和(自身を除く): 13999461

約数列:

[1, 3, 7, 13, 21, 39, 59, 91, 177, 273, 413, 767, 1239, 1297, 2301, 3891, 5369, 9079, 16107, 16861, 27237, 50583, 76523, 118027, 229569, 354081, 535661, 994799, 1606983, 2984397, 6963593, 20890779]

約数ペア:

[(1, 20890779), (3, 6963593), (7, 2984397), (13, 1606983), (21, 994799), (39, 535661), (59, 354081), (91, 229569), (177, 118027), (273, 76523), (413, 50583), (767, 27237), (1239, 16861), (1297, 16107), (2301, 9079), (3891, 5369)]