19991121

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{4889}}^1$

素因数の和:4968

約数の個数: 16

約数和(自身を含む): 28166400

約数和(自身を除く): 8175279

約数列:

[1, 3, 29, 47, 87, 141, 1363, 4089, 4889, 14667, 141781, 229783, 425343, 689349, 6663707, 19991121]

約数ペア:

[(1, 19991121), (3, 6663707), (29, 689349), (47, 425343), (87, 229783), (141, 141781), (1363, 14667), (4089, 4889)]