19780257

素因数分解:

$3^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{11923}}^1$

素因数の和:12012

約数の個数: 16

約数和(自身を含む): 30525440

約数和(自身を除く): 10745183

約数列:

[1, 3, 7, 21, 79, 237, 553, 1659, 11923, 35769, 83461, 250383, 941917, 2825751, 6593419, 19780257]

約数ペア:

[(1, 19780257), (3, 6593419), (7, 2825751), (21, 941917), (79, 250383), (237, 83461), (553, 35769), (1659, 11923)]