21664731

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{317}}^1$

素因数の和:459

約数の個数: 32

約数和(自身を含む): 33580800

約数和(自身を除く): 11916069

約数列:

[1, 3, 11, 19, 33, 57, 109, 209, 317, 327, 627, 951, 1199, 2071, 3487, 3597, 6023, 6213, 10461, 18069, 22781, 34553, 66253, 68343, 103659, 198759, 380083, 656507, 1140249, 1969521, 7221577, 21664731]

約数ペア:

[(1, 21664731), (3, 7221577), (11, 1969521), (19, 1140249), (33, 656507), (57, 380083), (109, 198759), (209, 103659), (317, 68343), (327, 66253), (627, 34553), (951, 22781), (1199, 18069), (2071, 10461), (3487, 6213), (3597, 6023)]