19991661

素因数分解:

$3^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1\times {\mathrm{1259}}^1$

素因数の和:1408

約数の個数: 16

約数和(自身を含む): 27417600

約数和(自身を除く): 7425939

約数列:

[1, 3, 67, 79, 201, 237, 1259, 3777, 5293, 15879, 84353, 99461, 253059, 298383, 6663887, 19991661]

約数ペア:

[(1, 19991661), (3, 6663887), (67, 298383), (79, 253059), (201, 99461), (237, 84353), (1259, 15879), (3777, 5293)]